v0.31.5 (Jun 17, 2024)

  • Feature PRO Introduced @server.script decorator (GH 2454).

  • Bug Fix PRO Prevent unnecessary tempdir creation when importing (GH 2452).

  • Bug Fix PRO Various bug fixes, including custom function date formatting (GH 2453).

v0.31.4 (Jun 3, 2024)

  • Enhancement PRO xlwings Server: Fix alert when backend is mounted on a non-root path (GH 2449).

  • Enhancement PRO xlwings Server: Allow to set the date format in Office.js-based custom functions via XLWINGS_DATE_FORMAT env var (GH 2447).

  • Bug Fix PRO xlwings Server: Fix a few issues with Matplotlib (GH 2445).

v0.31.3 (May 23, 2024)

  • Enhancement PRO xlwings Server: Allow streaming functions to authenticate via sync or async function (GH 2443).

v0.31.2 (May 18, 2024)

  • Enhancement PRO xlwings Server: Added support for (GH 2440).

  • Bug Fix PRO xlwings Server: fix an issue with custom functions and en-ch locale (GH 2437).

v0.31.1 (Apr 2, 2024)

  • Enhancement PRO xlwings Server: The xlwings.js functions now await the Office.onReady event and the alert endpoint does not need to handle line breaks anymore (GH 2425).

v0.31.0 (Mar 26, 2024)

  • Feature PRO This release adds support for streaming functions (the successor of RealTimeData/RTD functions) in connection with xlwings Server and Office.js add-ins. A streaming function is defined as an asynchronous generator (GH 2423):

    import asyncio
    from xlwings import server
    async def streaming_random(rows, cols):
        """A streaming function pushing updates of a random DataFrame every second"""
        rng = np.random.default_rng()
        while True:
            matrix = rng.standard_normal(size=(rows, cols))
            df = pd.DataFrame(matrix, columns=[f"col{i+1}" for i in range(matrix.shape[1])])
            yield df
            await asyncio.sleep(1)

For more details, see: Streaming functions (“RTD functions”)

v0.30.16 (Mar 16, 2024)

  • Bug Fix Fixed a regression with files synced to Sharepoint that was introduced in v0.30.14 (GH 2413).

  • Enhancement xw.arg now allows you to use *args as argument in addition to args for converting multiple arguments as provided by *args (GH 2407).

v0.30.15 (Feb 22, 2024)

  • Enhancement PRO New xlwings Server methods: Range.clear(), Range.clear_formats(), Sheet.clear(), Sheet.clear_contents(), Sheet.clear_formats(), and Sheet.delete() (GH 2325).

  • Bug Fix PRO Custom functions now handle *args properly and allow to use the @server.arg("*args") decorator (GH 2398).

  • Bug Fix PRO Added xlwings.getActiveBookName as convenience method in xlwings.js (GH 2405).

v0.30.14 (Feb 21, 2024)

  • Bug Fix When files are auto-saved to SharePoint, the xlwings configuration is now checked before trying to derive the local path via registry/env variables (GH 2396).

  • Enhancement PRO xlwings Reports now chunks the writing of big ranges (GH 2384).

  • Enhancement PRO Office.js add-ins can now use xlwings.getAccessToken() via xlwings.js to acquire an Entra ID access token (GH 2399).

v0.30.13 (Dec 12, 2023)

  • Enhancement Wheels are now built for Python 3.12 (GH 2341).

  • Bug Fix PRO The timeout argument in the RunRemotePython call has been fixed for high values (GH 2363).

  • Bug Fix Various bug fixes (GH 2335, GH 2356).

  • Breaking Change PRO Permissioning has been removed and replaced by the authentication in Office.js add-ins (GH 2336).

v0.30.12 (Sep 18, 2023)

  • Feature New CLI command xlwings py edit: this allows you to edit Microsoft’s Python in Excel cells (=PY) in an external editor of your choice with auto-sync (GH 2331).

v0.30.11 (Aug 26, 2023)

  • Bug Fix Enabled a conflict-free co-existence with Microsoft’s new Python in Excel feature as xlwings was internally also using =PY(). This requires that you re-import your User-defined functions (UDFs) (GH 2319).

  • Breaking Change xlwings Server: The @pro decorators have been deprecated in favor of @server decorators, so e.g., functions are now decorated with @server.func instead of @pro.func. The latter keeps working though for now (GH 2320).

v0.30.10 (Jun 23, 2023)

  • Breaking Change Dropped support for Python 3.7

  • Enhancement PRO xlwings Server: added custom_function_call_path parameter in (GH 2289).

v0.30.9 (Jun 12, 2023)

  • Enhancement PRO Custom functions: added support for help_url, which allows you to link to more information via the function wizard/formula builder. See Help URL (GH 2283).

  • Bug Fix PRO Fixed a bug with sheet-scoped named ranges in case the scope and refers_to point to different sheets (GH 2280).

v0.30.8 (May 27, 2023)

  • Enhancement PRO xlwings File Reader: when reading xls and xlsb formats, date cells are now properly converted into datetime objects (GH 2059).

v0.30.7 (May 18, 2023)

  • Enhancement PRO xlwings Server: added named range support for Office Scripts, Office.js, and Google Apps Script clients in addition to the VBA client (GH 2257).

  • Enhancement PRO xlwings Server: the documentation has been improved to point out that the book object has to be closed at the end of a request in oder to prevent a memory leak. This can be done via mybook.close() or by using Book as a context manager (with xw.Book(json=data) as book:`). Note that your framework may offer better means to automatically close the book at the end of a request via middleware or similar mechanism. As an example, for FastAPI, you can use dependency injection. See Introduction (GH 2260).

v0.30.6 (May 5, 2023)

  • Bug Fix PRO xlwings Server (Office Scripts client): named ranges with sheet scope were ignored (GH 2245).

  • Bug Fix PRO xlwings Server (Office.js client): excluded sheets were still loading sheet values (GH 2251).

v0.30.5 (Apr 25, 2023)

  • Enhancement PRO xlwings Server: this version adds picture support for Office Scripts and Office.js, meaning that pictures are now supported across all clients (GH 2235 and GH 2238).

  • Enhancement PRO xlwings Server: Excel tables can now be accessed via the mysheet['MyTable'] syntax in addition to mysheet.tables (GH 2229).

  • Bug Fix PRO Stability fixes with xw.apps.cleanup() (GH 2225 and GH 2239).

v0.30.4 (Mar 31, 2023)

  • Bug Fix Fixed a bug that could cause a CoInitialize has not been called error on Windows when xlwings was used inside a web framework (GH 2213).

  • Bug Fix PRO xlwings.min.js: Fixed a regression introduced with 0.30.3 that caused a pop-up error to show when calling xlwings.runPython (GH 2214).

  • Bug Fix PRO Fixed a regression introduced with 0.30.3 that was causing the xlwings license CLI command to fail on Linux (GH 2211).

v0.30.3 (Mar 26, 2023)

  • Enhancement PRO xlwings Server now supports Excel tables (GH 2072), range.insert() (GH 2073), and range.copy() (GH 2204).

  • Enhancement Improved error message when no engines is available either because of missing dependencies (OSS) or a missing license key (PRO) (GH 2072).

  • Breaking Change range.insert() now requires the shift argument. The previous default was to let Excel guess the shift direction (GH 2073).

v0.30.2 (Mar 16, 2023)

  • Enhancement On Windows, xlwings now actively cleans up Excel zombie processes when quitting or killing App objects and when exiting the Python process. You can also remove zombies manually by calling xw.apps.cleanup() (GH 2001).

  • Bug Fix PRO xlwings Reports: fixed a regression introduced with 0.30.1 that was causing issues when using Excel tables in frames (GH 2192).

v0.30.1 (Mar 6, 2023)

  • Enhancement Added support for Range.autofill() (interactive engines on Windows and macOS) (GH 2180).

  • Bug Fix PRO xlwings Reports: improved stability of dynamic range formatting by removing the use of the clipboard (GH 2175).

v0.30.0 (Mar 2, 2023)

  • Feature PRO xlwings Server now supports custom functions (a.k.a. user-defined functions or UDFs) on Windows, macOS, and Web via the Office.js add-ins. See Office.js Custom Functions (GH 2177).

  • Bug Fix PRO xlwings Reports: fixed render_template() on Windows when the template had hidden sheets (GH 2166).

v0.29.1 (Feb 5, 2023)

  • Enhancement PRO xlwings Server (VBA client): the default timeout for RunRemotePython has been increased from 5s to 30s (GH 2153).

  • Enhancement PRO xlwings Server (all clients): added support for app.macro() (GH 2157).

  • Enhancement PRO xlwings Server (all clients): added support for range.delete() (GH 2157).

v0.29.0 (Jan 29, 2023)

  • Feature PRO xlwings Server now supports Office.js add-ins! Check out the comprehensive documentation (GH 2151).

v0.28.9 (Jan 21, 2023)

  • Enhancement PRO xlwings Server: add full support for named ranges when called from VBA. JavaScript client implementations are still pending (GH 2145).

  • Bug Fix On macOS, opening a file was turning its name into lower case (GH 2052).

  • Bug Fix The xlwings CLI was removing the xlwings addin when the remove command was called with the --dir flag. Also, the xlwings.exe builds are now 32-bit (GH 2142).

v0.28.8 (Jan 13, 2023)

  • Bug Fix PRO xlwings Server: make include/exclude parameters respect all objects in a sheet, not just values (GH 2139).

  • Bug Fix PRO xlwings Server (VBA client): ignore shapes that aren’t real pictures in the pictures collection (GH 2140).

v0.28.7 (Dec 27, 2022)

  • Enhancement New CLI commands xlwings copy vba and xlwings copy vba --addin: They can help you to upgrade existing standalone projects and custom add-ins more easily (GH 2129).

  • Bug Fix PRO xlwings Server: Google Sheets was failing when cells contained a Date, caused by a recent Chromium V8 bug (GH 2126).

  • Bug Fix PRO xlwings Server: Writing datetime objects from Python to Google Sheets (with a time part not being zero) weren’t formatting the cell properly as Date Time (GH 2126).

v0.28.6 (Dec 15, 2022)

  • Feature xlwings now allows to authenticate and authorize users via Azure AD in connection with the Ribbon add-in or VBA standalone module. This is useful in connection with a server component, such as xlwings Server, where the acquired access tokens can be validated, see Server Auth (GH 2122).

  • Enhancement PRO xlwings Server: added support for reading the Names collection via mybook.names and mysheet.names (GH 2123).

  • Feature The xlwings CLI (command-line interface) is now also available as a standalone executable for a limited set of uses cases. It can be downloaded from the GitHub Release page and can be useful to run xlwings vba ..., xlwings auth ..., and xlwings addin ... -f without having to install a full Python installation (GH 2121).

  • Breaking Change PRO: xlwings Server: auth replaces the apiKey argument in the runPython and RunRemotePython calls respectively. Technically it’s only a deprecation, so apiKey still works for now (GH 2104).

  • Bug Fix PRO xlwings Server: Fixed an error with setting custom headers in VBA (GH 2081).

v0.28.4 and v0.28.5 (Oct 29, 2022)

  • Enhancement Added possibility to install the add-in globally for all users via xlwings addin install -g (GH 2075).

  • Enhancement Added App.path property (GH 2074).

  • Enhancement Build wheels for Python 3.11 (GH 2071).

  • Bug Fix 0.28.5 fixes an issue with the global add-in install (GH 2076).

v0.28.3 (Oct 21, 2022)

  • Bug Fix PRO xlwings File Reader: To be in line with the rest of the API, integers are now delivered as floats (GH 2066).

  • Bug Fix PRO xlwings File Reader: Fixed a bug that sometimes read in incorrect decimals with the legacy xls file formats (GH 2062).

  • Bug Fix PRO Fixed a bug introduced with 0.28.1 when xlwings code embed was run with the --file flag and a relative path (GH 2061).

v0.28.2 (Oct 17, 2022)

  • Breaking Change PRO xlwings File Reader: The reader was including Chartsheets etc. in mybook.sheets, which was inconsistent with the rest of the API. Accordingly, it now only shows Worksheets (GH 2058).

  • Bug Fix PRO xlwings File Reader: With xlsb formats, slightly unusual defined names caused the reader to fail (GH 2057).

  • Enhancement PRO xlwings Reports: the imports have been flattened. What previously was available via is now also available via xlwings.reports (GH 2055).

  • Enhancement PRO xlwings Reports: the registration of formatters for use with templates has been simplified by allowing you to use the @formatter decorator instead of having to register the function via register_formatter(myfunc) (GH 2055).

v0.28.1 (Oct 10, 2022)

  • Feature You can now use formatters to format the data you write to Excel or Google Sheets in a very flexible manner (see also Default Converter):

    import pandas as pd
    import xlwings as xw
    sheet = xw.Book().sheets[0]
    def table(rng: xw.Range, df: pd.DataFrame):
        """This is the formatter function"""
        # Header
        rng[0, :].color = "#A9D08E"
        # Rows
        for ix, row in enumerate(rng.rows[1:]):
            if ix % 2 == 0:
                row.color = "#D0CECE"  # Even rows
        # Columns
        for ix, col in enumerate(df.columns):
            if "two" in col:
                rng[1:, ix].number_format = "0.0%"
    df = pd.DataFrame(data={"one": [1, 2, 3, 4], "two": [5, 6, 7, 8]})
    sheet["A1"].options(formatter=table, index=False).value = df
  • Feature PRO Formatters are also available for xlwings Reports via filters: {{ df | formatter("myformatter") }}, see DataFrames Filters.

  • Feature You can now export a sheet to an HTML page via mysheet.to_html()

  • Feature New convenience property to get a list of the sheet names: mybook.sheet_names

  • Enhancement PRO The Excel File Reader now supports the Names collection. I.e., you can now run code like this:

    with xw.Book("myfile.xlsx", mode="r") as book:
        for name in book.names:
  • Enhancement PRO Code embedding via xlwings release or xlwings code embed now allows you to work with Python packages, i.e., nested directories.

v0.28.0 (Oct 4, 2022)

  • Feature PRO xlwings PRO adds an ultra fast file reader, allowing you to read Excel files much faster than via pandas.read_excel():

    with xw.Book("myfile.xlsx", mode="r") as book:
        sheet1 = book.sheets[0]
        df = sheet1["A1:B2"].options("df", index=False).value

    For all the details, see Excel File Reader.

  • Enhancement Book can now be used as context manager (i.e., with the with statement, see previous bullet point), which will close the book automatically when leaving the body of the with statement.

  • Enhancement The new option err_to_str allows you to deliver cell errors like #N/A as strings instead of None (default): xw.Book("mybook.xlsx").options(err_to_str=True).value.

  • Breaking Change PRO xlwings Server used to deliver cell errors as strings, which wasn’t consistent with the rest of xlwings. This has now been fixed by delivering them as None by default. To get the previous behavior, use the err_to_str option, see the previous bullet point.

  • Enhancement PRO The Remote Interpreter has been rebranded to xlwings Server.

v0.27.15 (Sep 16, 2022)

  • Enhancement PRO Reports: Added new vmerge filter to vertically merge cells with the same values, for details, see vmerge (GH 2020).

v0.27.14 (Aug 26, 2022)

  • Enhancement Allow to install/remove the addin via xlwings addin install while Excel is running (GH 1999).

v0.27.13 (Aug 22, 2022)

  • Feature Add support for alerts: myapp.alert("Hello World"), see myapp.alert() for more details (GH 756).

  • Enhancement Handle Timedelta dtypes in pandas DataFrames and Series (GH 1991).

  • Enhancement PRO Remove the cryptography dependency from xlwings PRO (GH 1992).

v0.27.12 (Aug 8, 2022)

  • Enhancement PRO: xlwings Server: added support for named ranges via mysheet["myname"] or mysheet.range("myname") (GH 1975).

  • Enhancement PRO: xlwings Server: in addition to Google Sheets, pictures.add() is now also supported on Desktop Excel (Windows and macOS). This includes support for Matplotlib plots (GH 1974).

  • Enhancement Faster UDFs (GH 1976).

  • Bug Fix Made myapp.range() behave the same as mysheet.range() (GH 1982).

  • Bug Fix PRO: xlwings Server: cell errors were causing a bug with Desktop Excel (GH 1968).

  • Bug Fix PRO: xlwings Server: sending large payloads with Desktop Excel on macOS is now possible (GH 1977).

v0.27.11 (Jul 6, 2022)

  • Enhancement Added support for pandas pd.NA (GH 1939).

  • Bug Fix Empty cells in UDFs are now properly returned as None / NaN instead of an empty string (GH 1947).

  • Bug Fix Resolved an issue with OneDrive/SharePoint files that are unsynced locally (GH 1946).

v0.27.10 (Jun 8, 2022)

  • Bug Fix PRO This release fixes a FileNotFound error that could sometimes happen with embedded code (GH 1931).

v0.27.9 (Jun 4, 2022)

  • Bug Fix Fixes a bug on Windows that caused an Excel Zombie process with pywin32 > v301 (GH 1929).

v0.27.8 (May 22, 2022)

  • Enhancement Smarter shrinking of Excel tables when using mytable.update(df) as it doesn’t delete rows below the table anymore (GH 1908).

  • Bug Fix Fixed a regression when RunPyhon was used with Use UDF Server = True (introduced in v0.26.2) (GH 1912).

  • Bug Fix PRO The xlwings release command would sometimes incorrectly show a version mismatch error (GH 1918).

  • Bug Fix PRO xlwings Reports now raises an explicit error when Jinja2 is missing (GH 1637).

v0.27.7 (May 1, 2022)

  • Feature PRO Google Sheets now support pictures via incl. Matplotlib/Plotly (note that Excel on the web and Desktop Excel via xlwings Server are not yet supported). Also note that Google Sheets allows a maximum of 1 million pixels as calculated by (width in inches * dpi) * (height in inches * dpi), see also Matplotlib & Plotly Charts (GH 1906).

  • Breaking Change Matplotlib plots are now written to Excel/Google Sheets with a default of 200 dpi instead of 300 dpi. You can change this (and all other options that Matplotlib’s savefig() and Plotly’s write_image() offer via, export_options={"bbox_inches": "tight", "dpi": 300}) (GH 665, GH 519).

v0.27.6 (Apr 11, 2022)

  • Bug Fix macOS: Python modules on OneDrive Personal are now found again in the default setup even if they have been migrated to the new location (GH 1891).

  • Enhancement PRO xlwings Server now shows nicely formatted error messages across all platforms (GH 1889).

v0.27.5 (Apr 1, 2022)

  • Enhancement PRO xlwings Server: added support for setting the number format of a range via myrange.number_format = "..." (GH 1887).

  • Bug Fix PRO xlwings Server: Google Sheets/Excel on the web were formatting strings like "1" as date (GH 1885).

v0.27.4 (Mar 29, 2022)

  • Enhancement Further SharePoint enhancements on Windows, increasing the chance that mybook.fullname returns the proper local filepath (by taking into account the info in the registry) (GH 1829).

  • Enhancement The ribbon, i.e., the config, now allows you to uncheck the box Add workbook to PYTHONPATH to not automatically add the directory of your workbook to the PYTHONPATH. The respective config is called ADD_WORKBOOK_TO_PYTHONPATH. This can be helpful if you experience issues with OneDrive/SharePoint: uncheck this box and provide the path where your source file is manually via the PYTHONPATH setting (GH 1873).

  • Enhancement PRO Added support for myrange.add_hyperlink() with remote interpreter (GH 1882).

  • Enhancement PRO Added a new optional parameter include in connection with runPython (JS) and RunRemotePython (VBA), respectively. It’s the counterpart to exclude and allows you to submit the names of the sheets that you want to send to the server. Like exclude, include accepts a comma-delimited string, e.g., “Sheet1,Sheet2” (GH 1882).

  • Enhancement PRO On Google Sheets, the xlwings JS module now automatically asks for the proper permission to allow authentication based on OAuth Token (GH 1876).

v0.27.3 (Mar 18, 2022)

  • Bug Fix PRO Fixes an issue with Date formatting on Google Sheets in case you’re not using the U.S. locale (GH 1866).

  • Bug Fix PRO Fixes the truncating of ranges with xlwings Server in case the range was partly outside the used range (GH 1822).

v0.27.2 (Mar 11, 2022)

  • Bug Fix PRO Fixes an issue with xlwings Server that occurred on 64-bit versions of Excel.

v0.27.0 and v0.27.1 (Mar 8, 2022)

  • Feature PRO This release adds support for xlwings Server to the Excel Desktop apps on both Windows and macOS. The new VBA function RunRemotePython is equivalent to runPython in the JavaScript modules of Google Sheets and Excel on the web, see xlwings Server (GH 1841).

  • Enhancement The xlwings package is now uploaded as wheel to PyPI in addition to the source format (GH 1855).

  • Enhancement The xlwings package is now compatible with Poetry (GH 1265).

  • Enhancement The add-in and the dll files are now code signed (GH 1848).

  • Breaking Change PRO The JavaScript modules (Google Sheet/Excel on the web ) changed the parameters in runPython, see xlwings Server (GH 1852).

  • Breaking Change xlwings vba edit has been refactored and there is an additional command xlwings vba import to edit your VBA code outside of the VBA editor, e.g., in VS Code or any other editor, see Command Line Client (CLI) (GH 1843).

  • Breaking Change The --unprotected flag has been removed from the xlwings addin install command. You can still manually remove the password (xlwings) though (GH 1850).

  • Bug Fix PRO The Markdown class has been fixed in case the first line was empty (GH 1856).

  • Bug Fix PRO 0.27.1 fixes an issue with the version string in the new RunRemotePython VBA call (GH 1859).

v0.26.3 (Feb 19, 2022)

  • Feature If you still have to write VBA code, you can now use the new CLI command xlwings vba edit: this will export all the VBA modules locally so that you can edit them with any editor like e.g., VS Code. Every local change is synced back whenever you save the local file, see Command Line Client (CLI) (GH 1839).

  • Enhancement PRO The permissioning feature now allows you to send an Authorization header via the new PERMISSION_CHECK_AUTHORIZATION setting (GH 1840).

v0.26.2 (Feb 10, 2022)

  • Feature Added support for myrange.clear_formats and mysheet.clear_formats (GH 1802).

  • Feature Added support for mychart.to_pdf() and myrange.to_pdf() (GH 1708).

  • Feature PRO xlwings Server: added support for mybook.selection (GH 1819).

  • Enhancement The quickstart command now makes sure that the project name is a valid Python module name (GH 1773).

  • Enhancement The to_pdf method now accepts an additional parameter quality that defaults to "standard" but can be set to "minimum" for smaller PDFs (GH 1697).

  • Bug Fix Allow space in path to Python interpreter when using UDFs / UDF Server (GH 974).

  • Bug Fix A few issues were fixed in case your files are synced with OneDrive or SharePoint (GH 1813 and GH 1810).

  • Bug Fix PRO Reports: fixed the aggsmall filter to work without the optional min_rows parameter (GH 1824).

v0.26.0 and v0.26.1 (Feb 1, 2022)

  • PRO Feature Added experimental support for Google Sheets and Excel on the web via a remote Python interpreter. For all the details, see xlwings Server.

  • PRO Bug Fix 0.26.1 fixes an issue with the xlwings copy gs command.

  • xlwings PRO is now free for noncommercial usage under the PolyForm Noncommercial License 1.0.0, see xlwings PRO for the details.

Older Releases

v0.25.3 (Dec 16, 2021)

  • PRO Bug Fix The xlwings Reports filters aggsmall and maxrows don’t fail with empty DataFrames anymore (GH 1788).

v0.25.2 (Dec 3, 2021)

  • PRO Enhancement xlwings Reports now ignores sheets whose name start with ## for both rendering and printing to PDF (GH 1779).

  • PRO Enhancement The aggsmall filter in xlwings Reports now accepts a new parameter min_rows (GH 1780).

v0.25.1 (Nov 21, 2021)

  • Enhancement now supports the password parameter (GH 1568).

  • PRO Bug Fix xlwings Reports would sometimes cause a Could not activate App instance error (GH 1764).

  • PRO Enhancement xlwings now warns about expiring developer license keys 30 days before they expire (GH 1758).

v0.25.0 (Oct 27, 2021)

  • Bug Fix Finally, xlwings adds proper support for OneDrive, OneDrive for Business, and SharePoint. This means that the quickstart setup (Excel file and Python file in the same folder with the same name) works even if the files are stored on OneDrive/SharePoint—as long as they are being synced locally. It also makes mybook.fullname return the local file path instead of a URL. Sometimes, this requires editing the configuration, see: OneDrive and SharePoint for the details (GH 1630).

  • Feature The update() method of Excel tables has been moved from PRO to open source. You can now easily update an existing table in Excel with the data from a new pandas DataFrame without messing up any formulas that reference that table: mytable.update(df), see: Table.update() (GH 1751).

  • PRO Breaking Change: Reports: create_report() is now deprecated in favor of render_template() that is available via app, book (new), and sheet objects, see: Quickstart (GH 1738).

  • Bug Fix Running UDFs from other Office apps has been fixed (GH 1729).

  • Bug Fix Writing to a protected sheet or using an invalid sheet name etc. caused xlwings to hang instead of raising an Exception (GH 1725).

v0.24.9 (Aug 26, 2021)

  • Bug Fix Fixed a regression introduced with 0.24.8 that was causing an error with pandas DataFrames that have repeated column headers (GH 1711).

v0.24.8 (Aug 25, 2021)

  • Feature New methods mychart.to_png(), myrange.to_png() and myrange.copy_picture() (GH 1707 and GH 582).

  • Enhancement You can now use the alias 'df' to convert to a pandas DataFrame: mysheet['A1:C3'].options('df').value is equivalent to import pandas as pd; mysheet['A1:C3'].options(pd.DataFrame).value (GH 1533).

  • Enhancement Added --dir option to xlwings addin install to allow the installation of all files in a directory as add-ins (GH 1702).

  • Bug Fix Pandas DataFrames now properly work with PeriodIndex / PeriodDtype (GH 1084).

  • PRO Reports: If there’s just one Frame, keep height of rows (GH 1698).

v0.24.7 (Aug 5, 2021)

  • PRO Breaking Change: Reports: Changed the order of the arguments of the arithmetic DataFrame filters: sum, div, mul and div to align them with the other filters. E.g., to multiply column 2 by 100, you now have to write your filter as {{ df | mul(100, 2) }} (GH 1696).

  • PRO Bug Fix Reports: Fixed an issue with images when pillow wasn’t installed (GH 1695).

v0.24.6 (Jul 31, 2021)

  • Enhancement You can now also define the color of cells, shapes and font objects with a hex string instead of just an RGB tuple, e.g., mysheet["A1"].color = "#efefef" (GH 1535).

  • Enhancement When you print a workbook or sheet to a pdf, you can now automatically open the PDF document via the new show argument: mybook.to_pdf(show=True) (GH 1683).

  • Bug Fix: This release includes another round of fixing the cleanup actions of the App() context manager (GH 1687).

  • PRO Enhancement Reports: New filter fontcolor, allowing you to write text in black and turn it into e.g., white for the report. This gets around the issue that white text isn’t visible in Excel on a white background: {{ myplaceholder | fontcolor("white") }}. Alternatively, you can also use a hex color (GH 1692).

  • PRO Bug Fix Positioning shapes wasn’t always respecting the top/left filters (GH 1687).

  • PRO Bug Fix Fixed a bug with non-string headers when calling table.update (GH 1687).

v0.24.5 (Jul 27, 2021)

  • PRO Bug Fix Reports: Using the header filter in a Frame was causing rows to be inserted (GH 1681).

v0.24.4 (Jul 26, 2021)

  • Feature is a new context manager that allows you to easily change the app’s properties temporarily. Once the code leaves the with block, the properties are changed back to their previous state (GH 254). For example:

    import xlwings as xw
    app = App()
        # Alerts are disabled until you leave the with block again
  • Enhancement The app properties myapp.enable_events and myapp.interactive are now supported (GH 254).

  • Enhancement mybook.to_pdf now ignores sheet names that start with a #. This can be changed by setting the new parameter exclude_start_string (GH 1667).

  • Enhancement New method mytable.resize() (GH 1662).

  • Bug Fix The new App context manager introduced with v0.24.3 was sometimes causing an error on Windows during the cleanup actions (GH 1668).


  • Breaking Change: DataFrame placeholders will now ignore the DataFrame’s index. If you need the index, reset it via : df.reset_index() before passing the DataFrame to create_report or render_template. This was required as the same column index used in filters would point to seemingly different columns in Excel depending on whether the index was included or not. This also means that the noindex and body filters are no obsolete and have been removed (GH 1676).

  • Enhancement Dataframe filters now respect the order in which they are called and can be used multiple times (GH 1675).

  • Enhancement New filters: format (to apply f-string like formatting), datetime (to format datetime objects), top and left (to position graphics outside of the grid structure) header, add, sub, mul, div (to only return the header of a DataFrame or apply an arithmetic operation, respectively) (GH 1666, GH 1660, GH 1677).

  • Enhancement: create_report can now be accessed as method of the app object like so: myapp.create_report (GH 1665).

  • Bug Fix: Excel tables that had the Header Row unchecked were sometimes causing row shifts in the template (GH 1663).

  • Bug Fix: Rendering a template was sometimes causing the following error PasteSpecial method of Range class failed (GH 1672).

v0.24.3 (Jul 15, 2021)

  • Enhancement xlwings.App() can now be used as context manager, making sure that there are no zombie processes left over on Windows, even if you use a hidden instance and your code fails. It is therefore recommended to use it whenever you can, like so:

    with xw.App(visible=True) as app:
  • Enhancement now accepts a new anchor argument that you can use as an alternative to top/left to position the picture by providing an anchor range object, e.g.:, anchor=mysheet['A1']) (GH 1648).

  • Bug Fix macOS: Plots are now sent to Excel in PDF format when you set format='vector' which is supporting transparency unlike the previously used eps format (GH 1647).

  • PRO Enhancement mybook.to_pdf now accepts a layout parameter so you can “print” your reports onto a PDF with your corporate layout including headers, footers and borderless graphics. See PDF Layout.

v0.24.2 (Jul 6, 2021)

  • Feature Added very basic support for mysheet.page_setup and myrange.note (GH 1551 and GH 896).

  • Enhancement DataFrames are now displayed in Excel tables with empty column names if the DataFrame doesn’t have a column or index name. This effect is e.g. visible when using xw.view() (GH 1643).

  • Enhancement now supports format='vector' which translates to 'svg' on Windows and 'eps' on macOS (GH 1640).

  • PRO Enhancement: The reports package now offers the additional DataFrame filters rowslice and colslice, see xlwings Reports (GH 1645).

  • PRO Bug Fix: Bug fix with handling Excel tables without headers.

Breaking Change

  • PRO Enhancement: <frame> markers now have to be defined as cell notes in the first row, see Frames: Multi-column Layout. This has the advantage that the Layout view corresponds to the print view (GH 1641). Also, the print area is now preserved even if you use Frames.

v0.24.1 (Jun 27, 2021)

  • PRO Enhancement: The reports package now offers the additional DataFrame filters head and tail, see xlwings Reports (GH 1633).

v0.24.0 (Jun 25, 2021)

  • Enhancement pictures.add() now accepts every picture format (including vector-based formats) that your Excel version supports. For example, on Windows you can use the svg format (only supported with Excel that comes with Microsoft 365) and on macOS, you can use eps (GH 1624).

  • [Enhancements] Support for Plotly images was moved from PRO to the Open Source version, i.e. you can now provide a Plotly image directly to pictures.add().

  • Enhancement Matplotlib and Plotly plots can now be sent to Excel in a vector-based format by providing the format argument, e.g. svg on Windows or eps on macOS.

  • Enhancement Removed dependency on pillow/PIL to properly size images via pictures.add().

  • Bug Fix Various fixes with scaling and positioning images via pictures.add() (GH 1491).

  • Feature New methods mypicture.lock_aspect_ratio and myapp.cut_copy_mode (GH 1622 and GH 1625).

  • PRO Feature: Reports: DataFrames and Images are now offering various filters to influence the behavior of how DataFrames and Images are displayed, giving the template designer the ability to change a lot of things that previously had to be taken care of by the Python developer. For example, to hide a DataFrame’s index, you can now do {{ df | noindex }} or to scale the image to double its size, you can do {{ img | scale(2) }}. You’ll find all available filters under xlwings Reports (GH 1602).

Breaking Change

  • Enhancement: When using pictures.add(), pictures arrive now in Excel in the same size as if you would manually add them via the Excel UI and setting width/height now behaves consistently during initial adding and resizing. Consequently, you may have to fix your image sizes when you upgrade. (GH 1491).

  • PRO The default MarkdownStyle removed the empty space after a h1 heading. You can always reintroduce it by applying a custom style (GH 1628).

v0.23.4 (Jun 15, 2021)

  • Bug Fix Windows: Fixed the ImportUDFs function in the VBA standalone module (GH 1601).

  • Bug Fix Fixed configuration hierarchy: if you have a setting with an empty value in the xlwings.conf sheet, it will not be overridden by the same key in the directory or user config file anymore. If you wanted it to be overridden, you’d have to get the key out of the “xlwings.conf” sheet (GH 1617).

  • PRO Feature Added the ability to block the execution of Python modules based on the file hash and/or machine name (GH 1586).

  • PRO Feature Added the xlwings release command for an easy release management in connection with the one-click installer, see 1-click Installer/Embedded Code. (GH 1429).

v0.23.3 (May 17, 2021)

  • Bug Fix Windows: UDFs returning a pandas.NaT were causing a #VALUE! error (GH 1590).

v0.23.2 (May 7, 2021)

v0.23.1 (Apr 19, 2021)

  • Feature You can now save your workbook in any format you want, simply by specifying its extension:'binaryfile.xlsb')'macroenabled.xlsm')
  • Feature Added support for the chunksize option: when you read and write from or to big ranges, you may have to chunk them or you will hit a timeout or a memory error. The ideal chunksize will depend on your system and size of the array, so you will have to try out a few different chunksizes to find one that works well (GH 77):

    import pandas as pd
    import numpy as np
    sheet = xw.Book().sheets[0]
    data = np.arange(75_000 * 20).reshape(75_000, 20)
    df = pd.DataFrame(data=data)
    sheet['A1'].options(chunksize=10_000).value = df

    And the same for reading:

    # As DataFrame
    df = sheet['A1'].expand().options(pd.DataFrame, chunksize=10_000).value
    # As list of list
    df = sheet['A1'].expand().options(chunksize=10_000).value
  • Enhancement xw.load() now expands to the current_region instead of relying on expand() (GH 1565).

  • Enhancement The OneDrive setting has been split up into a Windows and macOS-specific paths: ONEDRIVE_WIN and ONEDRIVE_MAC (GH 1556).

  • Bug Fix macOS: There are no more timeouts when opening or saving large workbooks that take longer than 60 seconds (GH 618).

  • Bug Fix RunPython was failing when there was a & in the Excel file name (GH 1557).

v0.23.0 (Mar 5, 2021)

  • PRO Feature: This release adds support for Markdown-based formatting of text, both in cells as well as in shapes, see Markdown Formatting for the details. This is also supported for template-based reports.

from import Markdown, MarkdownStyle

mytext = """\
# Title

Text **bold** and *italic*

* A first bullet
* A second bullet

# Another Title

This paragraph has a line break.
Another line.

sheet = xw.Book("Book1.xlsx").sheets[0]
sheet['A1'].value = Markdown(mytext)
sheet.shapes[0].text = Markdown(mytext)

Running this code will give you this nicely formatted text, but you can also define your own style to match your corporate style guide as explained under Markdown Formatting:

  • Feature Added support for the Font object via range or shape objects, see Font (GH 897 and GH 559).

  • Feature Added support for the Characters object via range or shape objects, see Characters.

v0.22.3 (Mar 3, 2021)

  • Enhancement As a convenience method, you can now directly export sheets to PDF instead of having to go through the book: mysheet.to_pdf() (GH 1517).

  • PRO Bug Fix Running RunPython with embedded code was broken in 0.22.0 (GH 1530).

v0.22.2 (Feb 8, 2021)

  • Bug Fix Windows: If the path of the Excel file included a single quote, UDFs were failing (GH 1511).

  • Bug Fix macOS: Prevent Excel from showing up when using hidden Excel instances via xw.App(visible=False) (GH 1508).

v0.22.1 (Feb 4, 2021)

  • PRO Bug Fix: Table.update has been fixed so it also works when the table is the data source of a chart (GH 1507).

  • PRO [Docs]: New documentation about how to work with Excel charts in templates; see Quickstart.

v0.22.0 (Jan 29, 2021)

  • Feature While it’s always been possible to somehow create your own xlwings-based add-ins, this release adds a toolchain to make it a lot easier to create your own white-labeled add-in, see Custom Add-ins (GH 1488).

  • Enhancement xw.view now formats the pandas DataFrames as Excel table and with the new xw.load function, you can easily load a DataFrame from your active workbook into a Jupyter notebook. See Jupyter Notebooks: Interact with Excel for a full tutorial (GH 1487).

  • Feature New method mysheet.copy() (GH 123).

  • PRO Feature: in addition to xw.create_report(), you can now also work within a workbook by using the new mysheet.render_template() method, see also Quickstart (GH 1478).

v0.21.4 (Nov 23, 2020)

  • Enhancement New property Shape.text to read and write text to the text frame of shapes (GH 1456).

  • PRO Feature: xlwings Reports now supports template text in shapes, see xlwings Reports.

v0.21.3 (Nov 22, 2020)

  • PRO Breaking Change: The Table.update method has been changed to treat the DataFrame’s index consistently whether or not it’s being written to an Excel table: by default, the index is now transferred to Excel in both cases.

v0.21.2 (Nov 15, 2020)

  • Bug Fix The default quickstart setup now also works when you store your workbooks on OneDrive (GH 1275)

  • Bug Fix Excel files that have single quotes in their paths are now working correctly (GH 1021)

v0.21.1 (Nov 13, 2020)

v0.21.0 (Nov 9, 2020)

  • Enhancement Added support for Excel tables, see: Table and Tables and range.table (GH 47 and GH 1364)

  • Enhancement: When using UDFs, you can now use 'range' for the convert argument where you would use before xw.Range. The latter will be removed in a future version (GH 1455).

  • Enhancement Windows: The comtypes requirement has been dropped (GH 1443).

  • PRO Feature: Table.update offers an easy way to keep your Excel tables in sync with your DataFrame source (GH 1454).

  • PRO Enhancement: The reports package now supports Excel tables in the templates. This is e.g. helpful to style the tables with striped rows, see Excel Tables (GH 1364).

v0.20.8 (Oct 18, 2020)

  • Enhancement Windows: With UDFs, you can now get easy access to the caller (an xlwings range object) by using caller as a function argument (GH 1434). In that sense, caller is now a reserved argument by xlwings and if you have any existing arguments with this name, you’ll need to rename them:

    def get_caller_address(caller):
        # caller will not be exposed in Excel, so use it like so:
        # =get_caller_address()
        return caller.address
  • Bug Fix Windows: The setting Show Console now also shows/hides the command prompt properly when using the UDF server with Conda. There is no more switching between python and pythonw required (GH 1435 and GH 1421).

  • Bug Fix Windows: Functions called via RunPython with Use UDF Server activated don’t require the xw.sub decorator anymore (GH 1418).

v0.20.7 (Sep 3, 2020)

  • Bug Fix Windows: Fix a regression introduced with 0.20.0 that would cause an AttributeError: Range.CLSID with async and legacy dynamic array UDFs (GH 1404).

  • Enhancement: Matplotlib figures are now converted to 300 dpi pictures for better quality when using them with pictures.add (GH 1402).

v0.20.6 (Sep 1, 2020)

  • Bug Fix macOS: App(visible=False) has been fixed (GH 652).

  • Bug Fix macOS: The regression with Book.fullname that was introduced with 0.20.1 has been fixed (GH 1390).

  • Bug Fix Windows: The retry mechanism has been improved (GH 1398).

v0.20.5 (Aug 27, 2020)

  • Bug Fix The conda version check was failing with spaces in the installation path (GH 1396).

  • Bug Fix Windows: when running app.quit(), the application is now properly closed without leaving a zombie process behind (GH 1397).

v0.20.4 (Aug 20, 2020)

  • Enhancement The add-in can now optionally be installed without the password protection: xlwings addin install --unprotected (GH 1392).

v0.20.3 (Aug 15, 2020)

  • Bug Fix The conda version check was erroneously triggered when importing UDFs on systems without conda. (GH 1389).

v0.20.2 (Aug 13, 2020)

  • PRO Feature: Code can now be embedded by calling the new xlwings code embed [--file] CLI command (GH 1380).

  • Bug Fix Made the import UDFs functionality more robust to prevent an Automation 440 error that some users would see (GH 1381).

  • Enhancement The standalone Excel file now includes all VBA dependencies to make it work on Windows and macOS (GH 1349).

  • Enhancement xlwings now blocks the call if the Conda Path/Env settings are used with legacy Conda installations (GH 1384).

v0.20.1 (Aug 7, 2020)

  • Bug Fix macOS: password-protected sheets caused an alert when calling xw.Book (GH 1377).

  • Bug Fix macOS: calling'newname.xlsx') wasn’t updating the wb object properly and caused an alert (GH 1129 and GH 626 and GH 957).

v0.20.0 (Jul 22, 2020)

This version drops support for Python 3.5

  • Feature New property xlwings.App.status_bar (GH 1362).

  • Enhancement xlwings.view() now becomes the active window, making it easier to work with in interactive workflows (please speak up if you feel differently) (GH 1353).

  • Bug Fix The UDF server has received a serious upgrade by njwhite, getting rid of the many issues that were around with using a combination of async functions and legacy dynamic arrays. You can now also call functions defined via async def, although for the time being they are still called synchronously from Excel (GH 1010 and GH 1164).

v0.19.5 (Jul 5, 2020)

  • Enhancement When you install the add-in via xlwings addin install, it autoconfigures the add-in if it can’t find an existing user config file (GH 1322).

  • Feature New xlwings config create [--force] command that autogenerates the user config file with the Python settings from which you run the command. Can be used to reset the add-in settings with the --force option (GH 1322).

  • Feature: There is a new option to show/hide the console window. Note that with Conda Path and Conda Env set, the console always pops up when using the UDF server. Currently only available on Windows (GH 1182).

  • Enhancement The Interpreter setting has been deprecated in favor of platform-specific settings: Interpreter_Win and Interpreter_Mac, respectively. This allows you to use the sheet config unchanged on both platforms (GH 1345).

  • Enhancement On macOS, you can now use a few environment-like variables in your settings: $HOME, $APPLICATIONS, $DOCUMENTS, $DESKTOP (GH 615).

  • Bug Fix: Async functions sometimes caused an error on older Excel versions without dynamic arrays (GH 1341).

v0.19.4 (May 20, 2020)

  • Feature xlwings addin install is now available on macOS. On Windows, it has been fixed so it should now work reliably (GH 704).

  • Bug Fix Fixed a dll load failed issue with pywin32 when installed via pip on Python 3.8 (GH 1315).

v0.19.3 (May 19, 2020)

  • PRO Feature: Added possibility to create deployment keys.

v0.19.2 (May 11, 2020)


v0.19.1 (May 4, 2020)

  • Bug Fix Fixed an issue with the xlwings PRO license key when there was no xlwings.conf file (GH 1308).

v0.19.0 (May 2, 2020)

  • Bug Fix Native dynamic array formulas can now be used with async formulas (GH 1277)

  • Enhancement Quickstart references the project’s name when run from Python instead of the active book (GH 1307)

Breaking Change:

  • Conda Base has been renamed into Conda Path to reduce the confusion with the Conda Env called base. Please adjust your settings accordingly! (GH 1194)

v0.18.0 (Feb 15, 2020)

v0.17.1 (Jan 31, 2020)

  • Bug Fix Handle np.float64('nan') correctly (GH 1116).

v0.17.0 (Jan 6, 2020)

This release drops support for Python 2.7 in xlwings CE. If you still rely on Python 2.7, you will need to stick to v0.16.6.

v0.16.6 (Jan 5, 2020)

  • Enhancement CLI changes with respect to xlwings license (GH 1227).

v0.16.5 (Dec 30, 2019)

  • Enhancement Improvements with regards to the Run main ribbon button (GH 1207 and GH 1222).

v0.16.4 (Dec 17, 2019)

v0.16.3 (Dec 12, 2019)

  • Bug Fix Sometimes, xlwings would show an error of a previous run. Moreover, 0.16.2 introduced an issue that would not show errors at all on non-conda setups (GH 1158 and GH 1206)

  • Enhancement The xlwings CLI now prints the version number (GH 1200)

Breaking Change

  • LOG FILE has been retired and removed from the configuration/add-in.

v0.16.2 (Dec 5, 2019)

  • Bug Fix RunPython can now be called in parallel from different Excel instances (GH 1196).

v0.16.1 (Dec 1, 2019)

  • Enhancement xlwings.Book() and now accept parameters like update_links, password etc. (GH 1189).

  • Bug Fix Conda Env now works correctly with base for UDFs, too (GH 1110).

  • Bug Fix Conda Base now allows spaces in the path (GH 1176).

  • Enhancement The UDF server timeout has been increased to 2 minutes (GH 1168).

v0.16.0 (Oct 13, 2019)

This release adds a small but very powerful feature: There’s a new Run main button in the add-in. With that, you can run your Python scripts from standard xlsx files - no need to save your workbook as macro-enabled anymore!

The only condition to make that work is that your Python script has the same name as your workbook and that it contains a function called main, which will be called when you click the Run button. All settings from your config file or config sheet are still respected, so this will work even if you have the source file in a different directory than your workbook (as long as that directory is added to the PYTHONPATH in your config).

The xlwings quickstart myproject has been updated accordingly. It still produces an xlsm file at the moment but you can save it as xlsx file if you intend to run it via the new Run button.


v0.15.10 (Aug 31, 2019)

  • Bug Fix Fixed a Python 2.7 incompatibility introduced with 0.15.9.

v0.15.9 (Aug 31, 2019)

  • Enhancement The sql extension now uses the native dynamic arrays if available (GH 1138).

  • Enhancement xlwings now support Path objects from pathlib for all file paths (GH 1126).

  • Bug Fix Various bug fixes: (GH 1118), (GH 1131), (GH 1102).

v0.15.8 (May 5, 2019)

  • Bug Fix Fixed an issue introduced with the previous release that always showed the command prompt when running UDFs, not just when using conda envs (GH 1098).

v0.15.7 (May 5, 2019)

  • Bug Fix Conda Base and Conda Env weren’t stored correctly in the config file from the ribbon (GH 1090).

  • Bug Fix UDFs now work correctly with Conda Base and Conda Env. Note, however, that currently there is no way to hide the command prompt in that configuration (GH 1090).

  • Enhancement Restart UDF Server now actually does what it says: it stops and restarts the server. Previously it was only stopping the server and only when the first call to Python was made, it was started again (GH 1096).

v0.15.6 (Apr 29, 2019)

  • Feature New default converter for OrderedDict (GH 1068).

  • Enhancement Import Functions now restarts the UDF server to guarantee a clean state after importing. (GH 1092)

  • Enhancement The ribbon now shows tooltips on Windows (GH 1093)

  • Bug Fix RunPython now properly supports conda environments on Windows (they started to require proper activation with packages like numpy etc). Conda >=4.6. required. A fix for UDFs is still pending (GH 954).

Breaking Change

  • Bug Fix RunFronzenPython now accepts spaces in the path of the executable, but in turn requires to be called with command line arguments as a separate VBA argument. Example: RunFrozenPython "C:\path\to\frozen_executable.exe", "arg1 arg2" (GH 1063).

v0.15.5 (Mar 25, 2019)

  • Enhancement wb.macro() now accepts xlwings objects as arguments such as range, sheet etc. when the VBA macro expects the corresponding Excel object (e.g. Range, Worksheet etc.) (GH 784 and GH 1084)

Breaking Change

  • Cells that contain a cell error such as #DIV/0!, #N/A, #NAME?, #NULL!, #NUM!, #REF!, #VALUE! return now None as value in Python. Previously they were returned as constant on Windows (e.g. -2146826246) or k.missing_value on Mac.

v0.15.4 (Mar 17, 2019)

  • [Win] BugFix: The ribbon was not showing up in Excel 2007. (GH 1039)

  • Enhancement: Allow to install xlwings on Linux even though it’s not a supported platform: export INSTALL_ON_LINUX=1; pip install xlwings (GH 1052)

v0.15.3 (Feb 23, 2019)

Bug Fix release:

  • [Mac] RunPython was broken by the previous release. If you install via conda, make sure to run xlwings runpython install again! (GH 1035)

  • [Win] Sometimes, the ribbon was throwing errors (GH 1041)

v0.15.2 (Feb 3, 2019)

Better support and docs for deployment, see Deployment:

  • You can now package your python modules into a zip file for easier distribution (GH 1016).

  • RunFrozenPython now allows to includes arguments, e.g. RunFrozenPython "C:\path\to\my.exe arg1 arg2" (GH 588).

Breaking Change

  • Accessing a not existing PID in the apps collection raises now a KeyError instead of an Exception (GH 1002).

v0.15.1 (Nov 29, 2018)

Bug Fix release:

  • [Win] Calling Subs or UDFs from VBA was causing an error (GH 998).

v0.15.0 (Nov 20, 2018)

Dynamic Array Refactor

While we’re all waiting for the new native dynamic arrays, it’s still going to take another while until the majority can use them (they are not yet part of Office 2019).

In the meantime, this refactor improves the current xlwings dynamic arrays in the following way:

  • Use of native (“legacy”) array formulas instead of having a normal formula in the top left cell and writing around it

  • It’s up to 2x faster

  • There’s no empty row/col required outside of the dynamic array anymore

  • It continues to overwrite existing cells (no change there)

  • There’s a small breaking change in the unlikely case that you were assigning values with the expand option: myrange.options(expand='table').value = [['b'] * 3] * 3. This was previously clearing contiguous cells to the right and bottom (or one of them depending on the option), now you have to do that explicitly.

Bug Fixes:

  • Importing multiple UDF modules has been fixed (GH 991).

v0.14.1 (Nov 9, 2018)

This is a bug fix release:

  • [Win] Fixed an issue when the new async_mode was used together with numpy arrays (GH 984)

  • [Mac] Fixed an issue with multiple arguments in RunPython (GH 905)

  • [Mac] Fixed an issue with the config file (GH 982)

v0.14.0 (Nov 5, 2018)


This release adds support for asynchronous functions (like all UDF related functionality, this is only available on Windows). Making a function asynchronous is as easy as:

import xlwings as xw
import time

def myfunction(a):
    time.sleep(5)  # long running tasks
    return a

See Asynchronous UDFs for the full docs.

Bug Fixes:

v0.13.0 (Oct 22, 2018)


This release adds a REST API server to xlwings, allowing you to easily expose your workbook over the internet.


  • Dynamic arrays are now more robust. Before, they often didn’t manage to write everything when there was a lot going on in the workbook (GH 880)

  • Jagged arrays (lists of lists where not all rows are of equal length) now raise an error (GH 942)

  • xlwings can now be used with threading, see the docs: Threading (GH 759).

  • [Win] xlwings now enforces pywin32 224 when installing xlwings on Python 3.7 (GH 959)

  • New xlwings.Sheet.used_range property (GH 112)

Bug Fixes:

  • The current directory is now inserted in front of everything else on the PYTHONPATH (GH 958)

  • The standalone files had an issue in the VBA module (GH 960)

Breaking Change

  • Members of the xw.apps collection are now accessed by key (=PID) instead of index, e.g.: xw.apps[12345] instead of xw.apps[0]. The apps collection also has a new xw.apps.keys() method. (GH 951)

v0.12.1 (Oct 7, 2018)

[Py27] Bug Fix for a Python 2.7 glitch.

v0.12.0 (Oct 7, 2018)


This release adds support to call Python functions from VBA in all Office apps (e.g. Access, Outlook etc.), not just Excel. As this uses UDFs, it is only available on Windows. See the docs: xlwings with other Office Apps.

Breaking Change

Previously, Python functions were always returning 2d arrays when called from VBA, no matter whether it was actually a 2d array or not. Now you get the proper dimensionality which makes it easier if the return value is e.g. a string or scalar as you don’t have to unpack it anymore.

Consider the following example using the VBA Editor’s Immediate Window after importing UDFs from a project created using by xlwings quickstart:

Old behaviour

hello xlwings

New behaviour

hello xlwings

Bug Fixes:

v0.11.8 (May 13, 2018)

  • [Win] pywin32 is now automatically installed when using pip (GH 827)

  • xlwings.bas has been readded to the python package. This facilitates e.g. the use of xlwings within other addins (GH 857)

v0.11.7 (Feb 5, 2018)

  • [Win] This release fixes a bug introduced with v0.11.6 that wouldn’t allow to open workbooks by name (GH 804)

v0.11.6 (Jan 27, 2018)

Bug Fixes:

  • [Win] When constantly writing to a spreadsheet, xlwings now correctly resumes after clicking into cells, previously it was crashing. (GH 587)

  • Options are now correctly applied when writing to a sheet (GH 798)

v0.11.5 (Jan 7, 2018)

This is mostly a bug fix release:

  • Config files can now additionally be saved in the directory of the workbooks, overriding the global Ribbon config, see Making use of Environment Variables (GH 772)

  • Reading Pandas DataFrames with a simple index was creating a MultiIndex with Pandas > 0.20 (GH 786)

  • [Win] The xlwings dlls are now properly versioned, allowing to use pre 0.11 releases in parallel with >0.11 releases (GH 743)

  • [Mac] Sheet.names.add() was always adding the names on workbook level (GH 771)

  • [Mac] UDF decorators now don’t cause errors on Mac anymore (GH 780)

v0.11.4 (Jul 23, 2017)

This release brings further improvements with regards to the add-in:

  • The add-in now shows the version on the ribbon. This makes it easy to check if you are using the correct version (GH 724):

  • [Mac] On Mac Excel 2016, the ribbon now only shows the available functionality (GH 723):

  • [Mac] Mac Excel 2011 is now supported again with the new add-in. However, since Excel 2011 doesn’t support the ribbon, the config file has been created/edited manually, see Making use of Environment Variables (GH 714).

Also, some new docs:

v0.11.3 (Jul 14, 2017)

  • Bug Fix: When using the xlwings.conf sheet, there was a subscript out of range error (GH 708)

  • Enhancement: The add-in is now password protected (pw: xlwings) to declutter the VBA editor (GH 710)

You need to update your xlwings add-in to get the fixes!

v0.11.2 (Jul 6, 2017)

  • Bug Fix: The sql extension was sometimes not correctly assigning the table aliases (GH 699)

  • Bug Fix: Permission errors during pip installation should be resolved now (GH 693)

v0.11.1 (Jul 5, 2017)

  • Bug Fix: The sql extension installs now correctly (GH 695)

v0.11.0 (Jul 2, 2017)

Big news! This release adds a full blown add-in! We also throw in a great In-Excel SQL Extension and a few bug fixes:



A few highlights:

  • Settings don’t have to be manipulated in VBA code anymore, but can be either set globally via Ribbon/config file or for the workbook via a special worksheet

  • UDF server can be restarted directly from the add-in

  • You can still use a VBA module instead of the add-in, but the recommended way is the add-in

  • Get all the details here: Add-in & Settings

In-Excel SQL Extension

The add-in can be extended with own code. We throw in an sql function, that allows you to perform SQL queries on data in your spreadsheets. It’s pretty awesome, get the details here: Extensions.

Bug Fixes

  • [Win]: Running Debug > Compile is not throwing errors anymore (GH 678)

  • Pandas deprecation warnings have been fixed (GH 675 and GH 664)

  • [Mac]: Errors are again shown correctly in a pop up (GH 660)

  • [Mac]: Like Windows, Mac now also only shows errors in a popup. Before it was including stdout, too (GH 666)

Breaking Change

  • RunFrozenPython now requires the full path to the executable.

  • The xlwings CLI xlwings template functionality has been removed. Use quickstart instead.

Migrate to v0.11 (Add-in)

This migration guide shows you how you can start using the new xlwings add-in as opposed to the old xlwings VBA module (and the old add-in that consisted of just a single import button).

Upgrade the xlwings Python package

  1. Check where xlwings is currently installed

    >>> import xlwings
    >>> xlwings.__path__
  2. If you installed xlwings with pip, for once, you should first uninstall xlwings: pip uninstall xlwings

  3. Check the directory that you got under 1): if there are any files left over, delete the xlwings folder and the remaining files manually

  4. Install the latest xlwings version: pip install xlwings

  5. Verify that you have >= 0.11 by doing

    >>> import xlwings
    >>> xlwings.__version__

Install the add-in

  1. If you have the old xlwings addin installed, find the location and remove it or overwrite it with the new version (see next step). If you installed it via the xlwings command line client, you should be able to do: xlwings addin remove.

  2. Close Excel. Run xlwings addin install from a command prompt. Reopen Excel and check if the xlwings Ribbon appears. If not, copy xlwings.xlam (from your xlwings installation folder under addin\xlwings.xlam manually into the XLSTART folder. You can find the location of this folder under Options > Trust Center > Trust Center Settings… > Trusted Locations, under the description Excel default location: User StartUp. Restart Excel and you should see the add-in.

Upgrade existing workbooks

  1. Make a backup of your Excel file

  2. Open the file and go to the VBA Editor (Alt-F11)

  3. Remove the xlwings VBA module

  4. Add a reference to the xlwings addin, see Installation

  5. If you want to use workbook specific settings, add a sheet xlwings.conf, see Workbook Config: xlwings.conf Sheet

Note: To import UDFs, you need to have the reference to the xlwings add-in set!

v0.10.4 (Feb 19, 2017)

  • [Win] Bug Fix: v0.10.3 introduced a bug that imported UDFs by default with volatile=True, this has now been fixed. You will need to reimport your functions after upgrading the xlwings package.

v0.10.3 (Jan 28, 2017)

This release adds new features to User Defined Functions (UDFs):

  • categories

  • volatile option

  • suppress calculation in function wizard


import xlwings as xw
@xw.func(category="xlwings", volatile=False, call_in_wizard=True)
def myfunction():
    return ...

For details, check out the (also new) and comprehensive API docs about the decorators: UDF decorators

v0.10.2 (Dec 31, 2016)

  • [Win] Python 3.6 is now supported (GH 592)

v0.10.1 (Dec 5, 2016)

  • Writing a Pandas Series with a MultiIndex header was not writing out the header (GH 572)

  • [Win] Docstrings for UDF arguments are now working (GH 367)

  • [Mac] Range.clear_contents() has been fixed (it was doing clear() instead) (GH 576)

  • xw.Book(...) and raise now the same error in case the file doesn’t exist (GH 540)

v0.10.0 (Sep 20, 2016)

Dynamic Array Formulas

This release adds an often requested & powerful new feature to User Defined Functions (UDFs): Dynamic expansion for array formulas. While Excel offers array formulas, you need to specify their dimensions up front by selecting the result array first, then entering the formula and finally hitting Ctrl-Shift-Enter. While this makes sense from a data integrity point of view, in practice, it often turns out to be a cumbersome limitation, especially when working with dynamic arrays such as time series data.

This is a simple example that demonstrates the syntax and effect of UDF expansion:

import numpy as np

def dynamic_array(r, c):
    return np.random.randn(int(r), int(c))

Note: Expanding array formulas will overwrite cells without prompting and leave an empty border around them, i.e. they will clear the row to the bottom and the column to the right of the array.

Bug Fixes

  • The int converter works now always as you would expect (e.g.: xw.Range('A1').options(numbers=int).value). Before, it could happen that the number was off by 1 due to floating point issues (GH 554).

v0.9.3 (Aug 22, 2016)

  • [Win] App.visible wasn’t behaving correctly (GH 551).

  • [Mac] Added support for the new 64bit version of Excel 2016 on Mac (GH 549).

  • Unicode book names are again supported (GH 546).

  • now supports relative paths. Also, when saving an existing book under a new name without specifying the full path, it’ll be saved in Python’s current working directory instead of in Excel’s default directory (GH 185).

v0.9.2 (Aug 8, 2016)

Another round of bug fixes:

  • [Mac]: Sometimes, a column was referenced instead of a named range (GH 545)

  • [Mac]: Python 2.7 was raising a LookupError: unknown encoding: mbcs (GH 544)

  • Fixed docs regarding set_mock_caller (GH 543)

v0.9.1 (Aug 5, 2016)

This is a bug fix release: As to be expected after a rewrite, there were some rough edges that have now been taken care of:

  • [Win] Opening a file via xw.Book() was causing an additional Book1 to be opened in case Excel was not running yet (GH 531)

  • [Win] Some users were getting an ImportError (GH 533)

  • [PY 2.7] RunPython was broken with Python 2.7 (GH 537)

  • Some corrections in the docs (GH 538 and GH 536)

v0.9.0 (Aug 2, 2016)

Exciting times! v0.9.0 is a complete rewrite of xlwings with loads of syntax changes (hence the version jump). But more importantly, this release adds a ton of new features and bug fixes that would have otherwise been impossible. Some of the highlights are listed below, but make sure to check out the full migration guide for the syntax changes in details. Note, however, that the syntax for user defined functions (UDFs) did not change. At this point, the API is fairly stable and we’re expecting only smaller changes on our way towards a stable v1.0 release.

  • Active book instead of current book: xw.Range('A1') goes against the active sheet of the active book like you’re used to from VBA. Instantiating an explicit connection to a Book is not necessary anymore:

    >>> import xlwings as xw
    >>> xw.Range('A1').value = 11
    >>> xw.Range('A1').value
  • Excel Instances: Full support of multiple Excel instances (even on Mac!)

    >>> app1 = xw.App()
    >>> app2 = xw.App()
    >>> xw.apps
    Apps([<Excel App 1668>, <Excel App 1644>])
  • New powerful object model based on collections and close to Excel’s original, allowing to fully qualify objects: xw.apps[0].books['MyBook.xlsx'].sheets[0].range('A1:B2').value

    It supports both Python indexing (square brackets) and Excel indexing (round brackets):

    xw.books[0].sheets[0] is the same as xw.books(1).sheets(1)

    It also supports indexing and slicing of range objects:

    >>> rng = xw.Range('A1:E10')
    >>> rng[1]
    <Range [Workbook1]Sheet1!$B$1>
    >>> rng[:2, :2]
    <Range [Workbook1]Sheet1!$A$1:$B$2>

    For more details, see Syntax Overview.

  • UDFs can now also be imported from packages, not just modules (GH 437)

  • Named Ranges: Introduction of full object model and proper support for sheet and workbook scope (GH 256)

  • Excel doesn’t become the active window anymore so the focus stays on your Python environment (GH 414)

  • When writing to ranges while Excel is busy, xlwings is now retrying until Excel is idle again (GH 468)

  • xlwings.view() has been enhanced to accept an optional sheet object (GH 469)

  • Objects like books, sheets etc. can now be compared (e.g. wb1 == wb2) and are properly hashable

  • Note that support for Python 2.6 has been dropped

Some of the new methods/properties worth mentioning are:

Bug Fixes

  • See here for details about which bugs have been fixed.

Migrate to v0.9

The purpose of this document is to enable you a smooth experience when upgrading to xlwings v0.9.0 and above by laying out the concept and syntax changes in detail. If you want to get an overview of the new features and bug fixes, have a look at the release notes. Note that the syntax for User Defined Functions (UDFs) didn’t change.

Full qualification: Using collections

The new object model allows to specify the Excel application instance if needed:

  • old: xw.Range('Sheet1', 'A1', wkb=xw.Workbook('Book1'))

  • new: xw.apps[0].books['Book1'].sheets['Sheet1'].range('A1')

See Syntax Overview for the details of the new object model.

Connecting to Books

  • old: xw.Workbook()

  • new: xw.Book() or via xw.books if you need to control the app instance.

See Connect to a Book for the details.

Active Objects

# Active app (i.e. Excel instance)
>>> app =

# Active book
>>> wb =  # in active app
>>> wb =  # in specific app

# Active sheet
>>> sht =  # in active book
>>> sht =  # in specific book

# Range on active sheet
>>> xw.Range('A1')  # on active sheet of active book of active app

Round vs. Square Brackets

Round brackets follow Excel’s behavior (i.e. 1-based indexing), while square brackets use Python’s 0-based indexing/slicing.

As an example, the following all reference the same range:


Access the underlying Library/Engine

  • old: xw.Range('A1').xl_range and xl_sheet etc.

  • new: xw.Range('A1').api, same for all other objects

This returns a pywin32 COM object on Windows and an appscript object on Mac.

Cheat sheet

Note that sht stands for a sheet object, like e.g. (in 0.9.0 syntax): sht = xw.books['Book1'].sheets[0]



Active Excel instance


New Excel instance

app = xw.App()


Get app from book

app =

app = xw.Application(wb)

Target installation (Mac)

app = xw.App(spec=...)

wb = xw.Workbook(app_target=...)

Hide Excel Instance

app = xw.App(visible=False)

wb = xw.Workbook(app_visible=False)

Selected Range



Calculation mode

app.calculation = 'manual'

app.calculation = xw.constants.Calculation.xlCalculationManual

All books in app



Fully qualified book



Active book in active app

New book in active app

wb = xw.Book()

wb = xw.Workbook()

New book in specific app

wb = app.books.add()


All sheets in book



Call a macro in an addin



First sheet of book wb


xw.Sheet(1, wkb=wb)

Active sheet or wb.active_sheet

Add sheet



Sheet count

wb.sheets.count or len(wb.sheets)


Add chart to sheet

chart = wb.sheets[0].charts.add()

chart = xw.Chart.add(sheet=1, wkb=wb)

Existing chart

wb.sheets['Sheet 1'].charts[0]

xw.Chart('Sheet 1', 1)

Chart Type

chart.chart_type = '3d_area'

chart.chart_type = xw.constants.ChartType.xl3DArea

Add picture to sheet


xw.Picture.add('path/to/pic', sheet=1, wkb=wb)

Existing picture

wb.sheets['Sheet 1'].pictures[0]

xw.Picture('Sheet 1', 1)

Matplotlib, name='x', update=True)

xw.Plot(fig).show('MyPlot', sheet=sht, wkb=wb)

Table expansion


xw.Range(sht, 'A1', wkb=wb).table

Vertical expansion


xw.Range(sht, 'A1', wkb=wb).vertical

Horizontal expansion


xw.Range(sht, 'A1', wkb=wb).horizontal

Set name of range

sht.range('A1').name = 'name'

xw.Range(sht, 'A1', wkb=wb).name = 'name'

Get name of range


xw.Range(sht, 'A1', wkb=wb).name

mock caller



v0.7.2 (May 18, 2016)

Bug Fixes

  • [Win] UDFs returning Pandas DataFrames/Series containing nan were failing (GH 446).

  • [Win] RunFrozenPython was not finding the executable (GH 452).

  • The xlwings VBA module was not finding the Python interpreter if PYTHON_WIN or PYTHON_MAC contained spaces (GH 461).

v0.7.1 (April 3, 2016)


  • [Win]: User Defined Functions (UDFs) support now optional/default arguments (GH 363)

  • [Win]: User Defined Functions (UDFs) support now multiple source files, see also under API changes below. For example (VBA settings): UDF_MODULES="common;myproject"

  • VBA Subs & Functions are now callable from Python:

    As an example, this VBA function:

    Function MySum(x, y)
        MySum = x + y
    End Function

    can be accessed like this:

    >>> import xlwings as xw
    >>> wb =
    >>> my_sum = wb.macro('MySum')
    >>> my_sum(1, 2)
  • New xw.view method: This opens a new workbook and displays an object on its first sheet. E.g.:

    >>> import xlwings as xw
    >>> import pandas as pd
    >>> import numpy as np
    >>> df = pd.DataFrame(np.random.rand(10, 4), columns=['a', 'b', 'c', 'd'])
    >>> xw.view(df)
  • New docs about Matplotlib & Plotly Charts and Custom Converter

  • New method: xlwings.Range.formula_array() (GH 411)

API changes

  • VBA settings: PYTHON_WIN and PYTHON_MAC must now include the interpreter if you are not using the default (PYTHON_WIN = "") (GH 289). E.g.:

    PYTHON_WIN: "C:\Python35\pythonw.exe"
    PYTHON_MAC: "/usr/local/bin/python3.5"
  • [Win]: VBA settings: UDF_PATH has been replaced with UDF_MODULES. The default behaviour doesn’t change though (i.e. if UDF_MODULES = "", then a Python source file with the same name as the Excel file, but with .py ending will be imported from the same directory as the Excel file).


    UDF_MODULES: "mymodule"
    PYTHONPATH: "C:\path\to"


    UDF_PATH: "C:\path\to\"

Bug Fixes

  • Numpy scalars issues were resolved (GH 415)

  • [Win]: xlwings was failing with freezers like cx_Freeze (GH 413)

  • [Win]: UDFs were failing if they were returning None or np.nan (GH 390)

  • Multiindex Pandas Series have been fixed (GH 383)

  • [Mac]: xlwings runpython install was failing (GH 424)

v0.7.0 (March 4, 2016)

This version marks an important first step on our path towards a stable release. It introduces converters, a new and powerful concept that brings a consistent experience for how Excel Ranges and their values are treated both when reading and writing but also across xlwings.Range objects and User Defined Functions (UDFs).

As a result, a few highlights of this release include:

  • Pandas DataFrames and Series are now supported for reading and writing, both via Range object and UDFs

  • New Range converter options: transpose, dates, numbers, empty, expand

  • New dictionary converter

  • New UDF debug server

  • No more pyc files when using RunPython

Converters are accessed via the new options method when dealing with xlwings.Range objects or via the @xw.arg and @xw.ret decorators when using UDFs. As an introductory sample, let’s look at how to read and write Pandas DataFrames:


Range object:

>>> import xlwings as xw
>>> import pandas as pd
>>> wb = xw.Workbook()
>>> df = xw.Range('A1:D5').options(pd.DataFrame, header=2).value
>>> df
    a     b
    c  d  e
10  1  2  3
20  4  5  6
30  7  8  9

# Writing back using the defaults:
>>> Range('A1').value = df

# Writing back and changing some of the options, e.g. getting rid of the index:
>>> Range('B7').options(index=False).value = df


This is the same sample as above (starting in Range('A13') on screenshot). If you wanted to return a DataFrame with the defaults, the @xw.ret decorator can be left away.

@xw.arg('x', pd.DataFrame, header=2)
def myfunction(x):
   # x is a DataFrame, do something with it
   return x


  • Dictionary (dict) converter:

    >>> Range('A1:B2').options(dict).value
    {'a': 1.0, 'b': 2.0}
    >>> Range('A4:B5').options(dict, transpose=True).value
    {'a': 1.0, 'b': 2.0}
  • transpose option: This works in both directions and finally allows us to e.g. write a list in column orientation to Excel (GH 11):

    Range('A1').options(transpose=True).value = [1, 2, 3]
  • dates option: This allows us to read Excel date-formatted cells in specific formats:

    >>> import datetime as dt
    >>> Range('A1').value
    datetime.datetime(2015, 1, 13, 0, 0)
    >>> Range('A1').options(, 1, 13)
  • empty option: This allows us to override the default behavior for empty cells:

    >>> Range('A1:B1').value
    [None, None]
    >>> Range('A1:B1').options(empty='NA')
    ['NA', 'NA']
  • numbers option: This transforms all numbers into the indicated type.

    >>> xw.Range('A1').value = 1
    >>> type(xw.Range('A1').value)  # Excel stores all numbers interally as floats
    >>> type(xw.Range('A1').options(numbers=int).value)
  • expand option: This works the same as the Range properties table, vertical and horizontal but is only evaluated when getting the values of a Range:

    >>> import xlwings as xw
    >>> wb = xw.Workbook()
    >>> xw.Range('A1').value = [[1,2], [3,4]]
    >>> rng1 = xw.Range('A1').table
    >>> rng2 = xw.Range('A1').options(expand='table')
    >>> rng1.value
    [[1.0, 2.0], [3.0, 4.0]]
    >>> rng2.value
    [[1.0, 2.0], [3.0, 4.0]]
    >>> xw.Range('A3').value = [5, 6]
    >>> rng1.value
    [[1.0, 2.0], [3.0, 4.0]]
    >>> rng2.value
    [[1.0, 2.0], [3.0, 4.0], [5.0, 6.0]]

All these options work the same with decorators for UDFs, e.g. for transpose:

@xw.arg('x', transpose=True)
def myfunction(x):
    # x will be returned unchanged as transposed both when reading and writing
    return x

Note: These options (dates, empty, numbers) currently apply to the whole Range and can’t be selectively applied to e.g. only certain columns.

  • UDF debug server

    The new UDF debug server allows you to easily debug UDFs: just set UDF_DEBUG_SERVER = True in the VBA Settings, at the top of the xlwings VBA module (make sure to update it to the latest version!). Then add the following lines to your Python source file and run it:

    if __name__ == '__main__':

    When you recalculate the Sheet, the code will stop at breakpoints or print any statements that you may have. For details, see: Debugging.

  • pyc files: The creation of pyc files has been disabled when using RunPython, leaving your directory in an uncluttered state when having the Python source file next to the Excel workbook (GH 326).

API changes

  • UDF decorator changes (it is assumed that xlwings is imported as xw and numpy as np):











    Pay attention to the following subtle change:



    @xw.arg("x", np.array)

    @xw.xlarg("x", "nparray")

  • Samples of how the new options method replaces the old Range keyword arguments:




    Range('A1:A2', atleast_2d=True)


    Range('A1:B2', asarray=True)

    Range('A1').options(index=False, header=False).value = df

    Range('A1', index=False, header=False).value = df

  • Upon writing, Pandas Series are now shown by default with their name and index name, if they exist. This can be changed using the same options as for DataFrames (GH 276):

    import pandas as pd
    # unchanged behaviour
    Range('A1').value = pd.Series([1,2,3])
    # Changed behaviour: This will print a header row in Excel
    s = pd.Series([1,2,3], name='myseries', index=pd.Index([0,1,2], name='myindex'))
    Range('A1').value = s
    # Control this behaviour like so (as with DataFrames):
    Range('A1').options(header=False, index=True).value = s
  • NumPy scalar values

    Previously, NumPy scalar values were returned as np.atleast_1d. To keep the same behaviour, this now has to be set explicitly using ndim=1. Otherwise they’re returned as numpy scalar values.



    Range('A1').options(np.array, ndim=1).value

    Range('A1', asarray=True).value

Bug Fixes

A few bugfixes were made: GH 352, GH 359.

v0.6.4 (January 6, 2016)

API changes



  • Quickstart: It’s now easier than ever to start a new xlwings project, simply use the command line client (GH 306):

    xlwings quickstart myproject will produce a folder with the following files, ready to be used (see Command Line Client (CLI)):

  • New documentation about how to use xlwings with other languages like R and Julia.

Bug Fixes

  • [Win]: Importing UDFs with the add-in was throwing an error if the filename was including characters like spaces or dashes (GH 331). To fix this, close Excel completely and run xlwings addin update.

  • [Win]: Workbook.caller() is now also accessible within functions that are decorated with @xlfunc. Previously, it was only available with functions that used the @xlsub decorator (GH 316).

  • Writing a Pandas DataFrame failed in case the index was named the same as a column (GH 334).

v0.6.3 (December 18, 2015)

Bug Fixes

  • [Mac]: This fixes a bug introduced in v0.6.2: When using RunPython from VBA, errors were not shown in a pop-up window (GH 330).

v0.6.2 (December 15, 2015)

API changes

  • LOG_FILE: So far, the log file has been placed next to the Excel file per default (VBA settings). This has been changed as it was causing issues for files on SharePoint/OneDrive and Mac Excel 2016: The place where LOG_FILE = "" refers to depends on the OS and the Excel version.


  • [Mac]: This version adds support for the VBA module on Mac Excel 2016 (i.e. the RunPython command) and is now feature equivalent with Mac Excel 2011 (GH 206).

Bug Fixes

  • [Win]: On certain systems, the xlwings dlls weren’t found (GH 323).

v0.6.1 (December 4, 2015)

Bug Fixes

  • [Python 3]: The command line client has been fixed (GH 319).

  • [Mac]: It now works correctly with psutil>=3.0.0 (GH 315).

v0.6.0 (November 30, 2015)

API changes



  • User Defined Functions (UDFs) - currently Windows only

    The ExcelPython project has been fully merged into xlwings. This means that on Windows, UDF’s are now supported via decorator syntax. A simple example:

    from xlwings import xlfunc
    def double_sum(x, y):
        """Returns twice the sum of the two arguments"""
        return 2 * (x + y)

    For array formulas with or without NumPy, see the docs: User Defined Functions (UDFs)

  • Command Line Client

    The new xlwings command line client makes it easy to work with the xlwings template and the developer add-in (the add-in is currently Windows-only). E.g. to create a new Excel spreadsheet from the template, run:

    xlwings template open

    For all commands, see the docs: Command Line Client (CLI)

  • Other enhancements:

v0.5.0 (November 10, 2015)

API changes



This version adds support for Matplotlib! Matplotlib figures can be shown in Excel as pictures in just 2 lines of code:

  1. Get a matplotlib figure object:

  • via PyPlot interface:

    import matplotlib.pyplot as plt
    fig = plt.figure()
    plt.plot([1, 2, 3, 4, 5])
  • via object oriented interface:

    from matplotlib.figure import Figure
    fig = Figure(figsize=(8, 6))
    ax = fig.add_subplot(111)
    ax.plot([1, 2, 3, 4, 5])
  • via Pandas:

    import pandas as pd
    import numpy as np
    df = pd.DataFrame(np.random.rand(10, 4), columns=['a', 'b', 'c', 'd'])
    ax = df.plot(kind='bar')
    fig = ax.get_figure()
  1. Show it in Excel as picture:

    plot = Plot(fig)'Plot1')

See the full API: xlwings.Plot(). There’s also a new example available both on GitHub and as download on the homepage.

Other enhancements:

  • New xlwings.Shape() class

  • New xlwings.Picture() class

  • The PYTHONPATH in the VBA settings now accepts multiple directories, separated by ; (GH 258)

  • An explicit exception is raised when Range is called with 0-based indices (GH 106)

Bug Fixes

  • Sheet.add was not always acting on the correct workbook (GH 287)

  • Iteration over a Range only worked the first time (GH 272)

  • [Win]: Sometimes, an error was raised when Excel was not running (GH 269)

  • [Win]: Non-default Python interpreters (as specified in the VBA settings under PYTHON_WIN) were not found if the path contained a space (GH 257)

v0.4.1 (September 27, 2015)

API changes



This release makes it easier than ever to connect to Excel from Python! In addition to the existing ways, you can now connect to the active Workbook (on Windows across all instances) and if the Workbook is already open, it’s good enough to refer to it by name (instead of having to use the full path). Accordingly, this is how you make a connection to… (GH 30 and GH 226):

  • a new workbook: wb = Workbook()

  • the active workbook [New!]: wb =

  • an unsaved workbook: wb = Workbook('Book1')

  • a saved (open) workbook by name (incl. xlsx etc.) [New!]: wb = Workbook('MyWorkbook.xlsx')

  • a saved (open or closed) workbook by path: wb = Workbook(r'C:\\path\\to\\file.xlsx')

Also, there are some new docs:

Bug Fixes

  • The Excel template was updated to the latest VBA code (GH 234).

  • Connections to files that are saved on OneDrive/SharePoint are now working correctly (GH 215).

  • Various issues with timezone-aware objects were fixed (GH 195).

  • [Mac]: A certain range of integers were not written to Excel (GH 227).

v0.4.0 (September 13, 2015)

API changes



The most important update with this release was made on Windows: The methodology used to make a connection to Workbooks has been completely replaced. This finally allows xlwings to reliably connect to multiple instances of Excel even if the Workbooks are opened from untrusted locations (network drives or files downloaded from the internet). This gets rid of the dreaded Filename is already open... error message that was sometimes shown in this context. It also allows the VBA hooks (RunPython) to work correctly if the very same file is opened in various instances of Excel.

Note that you will need to update the VBA module and that apart from pywin32 there is now a new dependency for the Windows version: comtypes. It should be installed automatically though when installing/upgrading xlwings with pip.

Other updates:

Bug Fixes

  • The VBA module was not accepting lower case drive letters (GH 205).

  • Fixed an error when adding a new Sheet that was already existing (GH 211).

v0.3.6 (July 14, 2015)

API changes

Application as attribute of a Workbook has been removed (wb is a Workbook object):

Correct Syntax (as before)





Excel 2016 for Mac Support (GH 170)

Excel 2016 for Mac is finally supported (Python side). The VBA hooks (RunPython) are currently not yet supported. In more details:

  • This release allows Excel 2011 and Excel 2016 to be installed in parallel.

  • Workbook() will open the default Excel installation (usually Excel 2016).

  • The new keyword argument app_target allows to connect to a different Excel installation, e.g.:

    Workbook(app_target='/Applications/Microsoft Office 2011/Microsoft Excel')

    Note that app_target is only available on Mac. On Windows, if you want to change the version of Excel that xlwings talks to, go to Control Panel > Programs and Features and Repair the Office version that you want as default.

  • The RunPython calls in VBA are not yet available through Excel 2016 but Excel 2011 doesn’t get confused anymore if Excel 2016 is installed on the same system - make sure to update your VBA module!

Other enhancements

  • New method: xlwings.Application.calculate() (GH 207)

Bug Fixes

  • [Win]: When using the OPTIMIZED_CONNECTION on Windows, Excel left an orphaned process running after closing (GH 193).

Various improvements regarding unicode file path handling, including:

  • [Mac]: Excel 2011 for Mac now supports unicode characters in the filename when called via VBA’s RunPython (but not in the path - this is a limitation of Excel 2011 that will be resolved in Excel 2016) (GH 154).

  • [Win]: Excel on Windows now handles unicode file paths correctly with untrusted documents. (GH 154).

v0.3.5 (April 26, 2015)

API changes

Sheet.autofit() and Range.autofit(): The integer argument for the axis has been removed (GH 186). Use string arguments rows or r for autofitting rows and columns or c for autofitting columns (as before).


New methods:


>>> rng = Range('A1').table
>>> rng.row, rng.column
(1, 1)
>>> rng.last_cell.row, rng.last_cell.column
(4, 5)

Bug Fixes

  • The unicode bug on Windows/Python3 has been fixed (GH 161)

v0.3.4 (March 9, 2015)

Bug Fixes

  • The installation error on Windows has been fixed (GH 160)

v0.3.3 (March 8, 2015)

API changes



  • New class Application with quit method and properties screen_updating und calculation (GH 101, GH 158, GH 159). It can be conveniently accessed from within a Workbook (on Windows, Application is instance dependent). A few examples:

    >>> from xlwings import Workbook, Calculation
    >>> wb = Workbook()
    >>> wb.application.screen_updating = False
    >>> wb.application.calculation = Calculation.xlCalculationManual
    >>> wb.application.quit()
  • New headless mode: The Excel application can be hidden either during Workbook instantiation or through the application object:

    >>> wb = Workbook(app_visible=False)
    >>> wb.application.visible
    >>> wb.application.visible = True
  • Newly included Excel template which includes the xlwings VBA module and boilerplate code. This is currently accessible from an interactive interpreter session only:

    >>> from xlwings import Workbook
    >>> Workbook.open_template()

Bug Fixes

  • [Win]: objects were causing an error (GH 44).

  • Depending on how it was instantiated, Workbook was sometimes missing the fullname attribute (GH 76).

  • Range.hyperlink was failing if the hyperlink had been set as formula (GH 132).

  • A bug introduced in v0.3.0 caused frozen versions (eg. with cx_Freeze) to fail (GH 133).

  • [Mac]: Sometimes, xlwings was causing an error when quitting the Python interpreter (GH 136).

v0.3.2 (January 17, 2015)

API changes




Bug Fixes

  • The method has been fixed to show the expected behavior (GH 138): Previously, calling save() without a path argument would always create a new file in the current working directory. This is now only happening if the file hasn’t been previously saved.

v0.3.1 (January 16, 2015)

API changes



  • New method (GH 110).

  • New method xlwings.Workbook.set_mock_caller() (GH 129). This makes calling files from both Excel and Python much easier:

    import os
    from xlwings import Workbook, Range
    def my_macro():
        wb = Workbook.caller()
        Range('A1').value = 1
    if __name__ == '__main__':
        # To run from Python, not needed when called from Excel.
        # Expects the Excel file next to this source file, adjust accordingly.
        path = os.path.abspath(os.path.join(os.path.dirname(__file__), 'myfile.xlsm'))
  • The simulation example on the homepage works now also on Mac.

Bug Fixes

  • [Win]: A long-standing bug that caused the Excel file to close and reopen under certain circumstances has been fixed (GH 10): Depending on your security settings (Trust Center) and in connection with files downloaded from the internet or possibly in connection with some add-ins, Excel was either closing the file and reopening it or giving a “file already open” warning. This has now been fixed which means that the examples downloaded from the homepage should work right away after downloading and unzipping.

v0.3.0 (November 26, 2014)

API changes

  • To reference the calling Workbook when running code from VBA, you now have to use Workbook.caller(). This means that wb = Workbook() is now consistently creating a new Workbook, whether the code is called interactively or from VBA.






This version adds two exciting but still experimental features from ExcelPython (Windows only!):

  • Optimized connection: Set the OPTIMIZED_CONNECTION = True in the VBA settings. This will use a COM server that will keep the connection to Python alive between different calls and is therefore much more efficient. However, changes in the Python code are not being picked up until the pythonw.exe process is restarted by killing it manually in the Windows Task Manager. The suggested workflow is hence to set OPTIMIZED_CONNECTION = False for development and only set it to True for production - keep in mind though that this feature is still experimental!

  • User Defined Functions (UDFs): Using ExcelPython’s wrapper syntax in VBA, you can expose Python functions as UDFs, see User Defined Functions (UDFs) for details.

Note: ExcelPython’s developer add-in that autogenerates the VBA wrapper code by simply using Python decorators isn’t available through xlwings yet.

Further enhancements include:

Bug Fixes

  • [Mac]: Environment variables from .bash_profile are now available when called from VBA, e.g. by using: os.environ['USERNAME'] (GH 95)

v0.2.3 (October 17, 2014)

API changes



  • New method Sheet.add() (GH 71):

    >>> Sheet.add()  # Place at end with default name
    >>> Sheet.add('NewSheet', before='Sheet1')  # Include name and position
    >>> new_sheet = Sheet.add(after=3)
    >>> new_sheet.index
  • New method Sheet.count():

    >>> Sheet.count()
  • autofit() works now also on Sheet objects, not only on Range objects (GH 66):

    >>> Sheet(1).autofit()  # autofit columns and rows
    >>> Sheet('Sheet1').autofit('c')  # autofit columns
  • New property number_format for Range objects (GH 60):

    >>> Range('A1').number_format
    >>> Range('A1:C3').number_format = '0.00%'
    >>> Range('A1:C3').number_format

    Works also with the Range properties table, vertical, horizontal:

    >>> Range('A1').value = [1,2,3,4,5]
    >>> Range('A1').table.number_format = '0.00%'
  • New method get_address for Range objects (GH 7):

    >>> Range((1,1)).get_address()
    >>> Range((1,1)).get_address(False, False)
    >>> Range('Sheet1', (1,1), (3,3)).get_address(True, False, include_sheetname=True)
    >>> Range('Sheet1', (1,1), (3,3)).get_address(True, False, external=True)
  • New method Sheet.all() returning a list with all Sheet objects:

    >>> Sheet.all()
    [<Sheet 'Sheet1' of Workbook 'Book1'>, <Sheet 'Sheet2' of Workbook 'Book1'>]
    >>> [ for i in Sheet.all()]
    ['sheet1', 'sheet2']
    >>> [i.autofit() for i in Sheet.all()]

Bug Fixes

  • xlwings works now also with NumPy < 1.7.0. Before, doing something like Range('A1').value = 'Foo' was causing a NotImplementedError: Not implemented for this type error when NumPy < 1.7.0 was installed (GH 73).

  • [Win]: The VBA module caused an error on the 64bit version of Excel (GH 72).

  • [Mac]: The error pop-up wasn’t shown on Python 3 (GH 85).

  • [Mac]: Autofitting bigger Ranges, e.g. Range('A:D').autofit() was causing a time out (GH 74).

  • [Mac]: Sometimes, calling xlwings from Python was causing Excel to show old errors as pop-up alert (GH 70).

v0.2.2 (September 23, 2014)

API changes

  • The Workbook qualification changed: It now has to be specified as keyword argument. Assume we have instantiated two Workbooks like so: wb1 = Workbook() and wb2 = Workbook(). Sheet, Range and Chart classes will default to wb2 as it was instantiated last. To target wb1, use the new wkb keyword argument:



    Range('A1', wkb=wb1).value


    Chart('Chart1', wkb=wb1)


    Alternatively, simply set the current Workbook before using the Sheet, Range or Chart classes:

  • Through the introduction of the Sheet class (see Enhancements), a few methods moved from the Workbook to the Sheet class. Assume the current Workbook is: wb = Workbook():










  • The syntax to add a new Chart has been slightly changed (it is a class method now):






  • [Mac]: Python errors are now also shown in a Message Box. This makes the Mac version feature equivalent with the Windows version (GH 57):

  • New Sheet class: The new class handles everything directly related to a Sheet. See the Python API section about Sheet for details (GH 62). A few examples:

    >>> Sheet(1).name
    >>> Sheet('Sheet1').clear_contents()
    <Sheet 'Sheet1' of Workbook 'Book1'>
  • The Range class has a new method autofit() that autofits the width/height of either columns, rows or both (GH 33).


    axis : string or integer, default None
        - To autofit rows, use one of the following: 'rows' or 'r'
        - To autofit columns, use one of the following: 'columns' or 'c'
        - To autofit rows and columns, provide no arguments


    # Autofit column A
    # Autofit row 1
    # Autofit columns and rows, taking into account Range('A1:E4')
    # AutoFit rows, taking into account Range('A1:E4')
  • The Workbook class has the following additional methods: current() and set_current(). They determine the default Workbook for Sheet, Range or Chart. On Windows, in case there are various Excel instances, when creating new or opening existing Workbooks, they are being created in the same instance as the current Workbook.

    >>> wb1 = Workbook()
    >>> wb2 = Workbook()
    >>> Workbook.current()
    <Workbook 'Book2'>
    >>> wb1.set_current()
    >>> Workbook.current()
    <Workbook 'Book1'>
  • If a Sheet, Range or Chart object is instantiated without an existing Workbook object, a user-friendly error message is raised (GH 58).

  • New docs about Debugging and Data Structures Tutorial.

Bug Fixes

  • The atleast_2d keyword had no effect on Ranges consisting of a single cell and was raising an error when used in combination with the asarray keyword. Both have been fixed (GH 53):

    >>> Range('A1').value = 1
    >>> Range('A1', atleast_2d=True).value
    >>> Range('A1', atleast_2d=True, asarray=True).value
  • [Mac]: After creating two new unsaved Workbooks with Workbook(), any Sheet, Range or Chart object would always just access the latest one, even if the Workbook had been specified (GH 63).

  • [Mac]: When xlwings was imported without ever instantiating a Workbook object, Excel would start upon quitting the Python interpreter (GH 51).

  • [Mac]: When installing xlwings, it now requires psutil to be at least version 2.0.0 (GH 48).

v0.2.1 (August 7, 2014)

API changes



  • All VBA user settings have been reorganized into a section at the top of the VBA xlwings module:

    PYTHON_WIN = ""
    PYTHON_MAC = GetMacDir("Home") & "/anaconda/bin"
    PYTHON_FROZEN = ThisWorkbook.Path & "\build\exe.win32-2.7"
    PYTHONPATH = ThisWorkbook.Path
    LOG_FILE = ThisWorkbook.Path & "\xlwings_log.txt"
  • Calling Python from within Excel VBA is now also supported on Mac, i.e. Python functions can be called like this: RunPython("import bar;"). Running frozen executables (RunFrozenPython) isn’t available yet on Mac though.

Note that there is a slight difference in the way that this functionality behaves on Windows and Mac:

  • Windows: After calling the Macro (e.g. by pressing a button), Excel waits until Python is done. In case there’s an error in the Python code, a pop-up message is being shown with the traceback.

  • Mac: After calling the Macro, the call returns instantly but Excel’s Status Bar turns into “Running…” during the duration of the Python call. Python errors are currently not shown as a pop-up, but need to be checked in the log file. I.e. if the Status Bar returns to its default (“Ready”) but nothing has happened, check out the log file for the Python traceback.

Bug Fixes


Special thanks go to Georgi Petrov for helping with this release.

v0.2.0 (July 29, 2014)

API changes



  • Cross-platform: xlwings is now additionally supporting Microsoft Excel for Mac. The only functionality that is not yet available is the possibility to call the Python code from within Excel via VBA macros.

  • The clear and clear_contents methods of the Workbook object now default to the active sheet (GH 5):

    wb = Workbook()
    wb.clear_contents()  # Clears contents of the entire active sheet

Bug Fixes

  • DataFrames with MultiHeaders were sometimes getting truncated (GH 41).

v0.1.1 (June 27, 2014)

API Changes

  • If asarray=True, NumPy arrays are now always at least 1d arrays, even in the case of a single cell (GH 14):

    >>> Range('A1', asarray=True).value
  • Similar to NumPy’s logic, 1d Ranges in Excel, i.e. rows or columns, are now being read in as flat lists or 1d arrays. If you want the same behavior as before, you can use the atleast_2d keyword (GH 13).


    The table property is also delivering a 1d array/list, if the table Range is really a column or row.

    >>> Range('A1').vertical.value
    [1.0, 2.0, 3.0, 4.0]
    >>> Range('A1', atleast_2d=True).vertical.value
    [[1.0], [2.0], [3.0], [4.0]]
    >>> Range('C1').horizontal.value
    [1.0, 2.0, 3.0, 4.0]
    >>> Range('C1', atleast_2d=True).horizontal.value
    [[1.0, 2.0, 3.0, 4.0]]
    >>> Range('A1', asarray=True).table.value
    array([ 1.,  2.,  3.,  4.])
    >>> Range('A1', asarray=True, atleast_2d=True).table.value
    array([[ 1.],
           [ 2.],
           [ 3.],
           [ 4.]])
  • The single file approach has been dropped. xlwings is now a traditional Python package.


  • xlwings is now officially suppported on Python 2.6-2.7 and 3.1-3.4

  • Support for Pandas Series has been added (GH 24):

    >>> import numpy as np
    >>> import pandas as pd
    >>> from xlwings import Workbook, Range
    >>> wb = Workbook()
    >>> s = pd.Series([1.1, 3.3, 5., np.nan, 6., 8.])
    >>> s
    0    1.1
    1    3.3
    2    5.0
    3    NaN
    4    6.0
    5    8.0
    dtype: float64
    >>> Range('A1').value = s
    >>> Range('D1', index=False).value = s
  • Excel constants have been added under their original Excel name, but categorized under their enum (GH 18), e.g.:

    # Extra long version
    import xlwings as xl
    # Long version
    from xlwings import constants
    # Short version
    from xlwings import ChartType
  • Slightly enhanced Chart support to control the ChartType (GH 1):

    >>> from xlwings import Workbook, Range, Chart, ChartType
    >>> wb = Workbook()
    >>> Range('A1').value = [['one', 'two'],[10, 20]]
    >>> my_chart = Chart().add(chart_type=ChartType.xlLine,
                               name='My Chart',

    alternatively, the properties can also be set like this:

    >>> my_chart = Chart().add()  # Existing Charts: my_chart = Chart('My Chart')
    >>> = 'My Chart'
    >>> my_chart.chart_type = ChartType.xlLine
    >>> my_chart.set_source_data(Range('A1').table)
  • pytz is no longer a dependency as datetime object are now being read in from Excel as time-zone naive (Excel doesn’t know timezones). Before, datetime objects got the UTC timezone attached.

  • The Workbook class has the following additional methods: close()

  • The Range class has the following additional methods: is_cell(), is_column(), is_row(), is_table()

Bug Fixes

  • Writing None or np.nan to Excel works now (GH 16 & GH 15).

  • The import error on Python 3 has been fixed (GH 26).

  • Python 3 now handles Pandas DataFrames with MultiIndex headers correctly (GH 39).

  • Sometimes, a Pandas DataFrame was not handling nan correctly in Excel or numbers were being truncated (GH 31) & (GH 35).

  • Installation is now putting all files in the correct place (GH 20).

v0.1.0 (March 19, 2014)

Initial release of xlwings.