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Notable changes in recent builds

Maintained by hand, so what's "notable" is subjective! Contributors are encouraged to add entries for their work.

All changes can be found via git - eg, for all changes after a build:

git log -rb3xx:

or

https://github.com/mhammond/pywin32/compare/b3xx...main

As of build 305, installation .exe files have been deprecated; see https://mhammond.github.io/pywin32_installers.html.

Coming in build 312, as yet unreleased

  • Fixed axdebug build on Python 3.11+ using CPython's new opaque frame APIs, fixed 64-bit overflow in sourceContext and stack addresses, fixed incorrect step-over and step-out behavior, and fixed ListEnumeratorGateway.Next() returning lazy map iterator incompatible with C++ COM gateways that require a sequence (#2723, #2724, #2725, @wxinix-2022)
  • Removed more leftover obsolete UNICODE constants since dropping Python 2 support in win32ui, win32gui and win32clipboard (#2717, @Avasam)
  • Implement COM Records as [out] method parameters (#2708, @geppi, @the-snork)
  • Implement multidimensional SAFEARRAY(COM Record) and SAFEARRAY(double) (#2655, @geppi)
  • Added many missing license and copyright notice files (#2590, @Avasam)
  • Fixed missing version stamp on built .dll and .exe files (#2647, @Avasam)
  • Bugfix for COM Record instance creation (#2641, @geppi)
  • Fix regression introduced by #2506 (#2640, @geppi)
  • Fixed LoadPerfCounterTextStrings and UnloadPerfCounterTextStrings's bQuiet param being unused and hardcoded to True (#2711, @Avasam)
  • Removed considerations for unsupported Windows Versions (95/98/ME/2000/2k/Vista, most of XP) (#2711, #2667, #2400, @Avasam)
    • Updated a lot of dynamic function loading at runtime to instead use static build linking
    • Updated a lot of documentation
    • This removes the following constants:
      • win32con.FILE_ATTRIBUTE_ATOMIC_WRITE
      • win32con.FILE_ATTRIBUTE_XACTION_WRITE
  • Removed considerations for MFC < 9 (VS 2008) (#2669, #2716, @Avasam)
    • This removes the unusable PyCSliderCtrl.VerifyPos method
  • Dropped support for Python 3.8 (#2413, @Avasam)
    • Note that whilst pywin32 hasn't explicitly dropped support for Windows 7 / 8 / Server 2008, Python 3.8 was the last official CPython version to support those versions (Python 3.9 installer requires at least Windows 8.1 / Server 2012).

Build 311, released 2025/07/14

  • Fix use-after-free in CertDeleteCertificateFromStore (#2637)
  • Better support for COM identifiers with non-ascii characters (#2632)
  • pywin32's own warnings will now refer to the caller, rather than to the internal source of warning itself (#2594, @Avasam)
  • Fixed a regression that broke special __dunder__ methods with CoClass. (#1870, #2493, @Avasam, @geppi)
  • Fixed TypeError: cannot unpack non-iterable NoneType object when registering an axscript client ScriptItem (#2513, @Avasam)
  • Fixed a memory leak when SafeArrays are used as out parameters (@the-snork)
  • Fixed dispatch handling for properties (@the-snork)
  • Resolved a handful of deprecation warnings (#2567, #2576, @Avasam)
  • The following classes now produce a valid eval string representation when calling repr: (#2573, @Avasam)
    • pywin.tools.browser.HLIPythonObject
    • win32com.server.exception.COMException
    • win32comext.axscript.client.error.AXScriptException
    • win32comext.axscript.client.pyscript.NamedScriptAttribute
  • Added initial DECIMAL/VT_DECIMAL support (#1501, @gesslerpd)

Build 310, released 2025/03/16

  • Fixed a regression where win32com.client.DispatchWithEvents and win32com.client.WithEvents would throw a TypeError on the second call (#2491, @Avasam)
  • Fixed regression causing win32com.shell.shell to be missing a number of IIDs. (#2487, @Avasam)
  • As part of the above, Windows 7 is now minimum supported.

Build 309, released 2025/03/09

pywin32

  • Fixed Access Violation crashes in 3.12 by moving PyWInObject_Free* methods so GIL is acquired (#2467, @Mscht)
  • Added support for relative path for pywin32_postinstall's -destination argument (#2454, @Avasam)
  • The postinstall script is now available as a console script. You can invoke it in one of two new methods: (#2408, @Avasam)
    1. python -m pywin32_postinstall -install (recommended)
    2. pywin32_postinstall -install (shorter but you don't have control over which python environment is used)
  • Changed the implementation of 'com_record' to a subclassable Python type (#2437, #2361, @geppi)
  • Removed param hIcon from win32comext.shell.ShellExecuteEx. It was unusable since Windows Vista (#2423, @Avasam)
  • Fixed nbios.NCBStruct packing (#2406, @Avasam)
  • Restored axdebug builds on Python 3.10 (#2416, @Avasam)
  • Fix for Python 3.12 interpreter crashes when accessing a COM Record field (#2415, @geppi)
  • Pythonwin: Bumped Scintilla from 1.77 to 4.4.6. The full changelog can be found here: https://www.scintilla.org/ScintillaHistory.html
  • Fixed Pythonwin's editor failing due to invalid regex import (#2419, @Avasam)
  • Last error wrongly set by some modules (#2302, @CristiFati)
  • Dropped support for Python 3.7 (#2207, @Avasam)
  • Implement the creation of SAFEARRAY(VT_RECORD) from a sequence of COM Records (#2317, @geppi)
  • Implement record pointers as [in, out] method parameters of a Dispatch Interface (#2304, #2310, @geppi)
  • Fix memory leak converting to PyObject from some SAFEARRAY elements (#2316)
  • Fix bug where makepy support was unnecessarily generated (#2354, #2353, @geppi)
  • Fail sooner on invalid win32timezone.TimeZoneInfo creation (#2338, @Avasam)
  • Removed temporary win32com.server.policy reexports hack (#2344, @Avasam) Import DispatcherWin32trace and DispatcherTrace from win32com.server.dispatcher instead.
  • Fixed win32timezone.TimeZoneInfo initialization from a [DYNAMIC_]TIME_ZONE_INFORMATION (#2339, @Avasam)
  • Added runtime deprecation warning of win2kras, use win32ras instead (#2356, @Avasam)
  • Improved handling of dict iterations and fallbacks (removes Python 2 support code, small general speed improvement) (#2332, #2330, @Avasam)
  • Fixed accidentally trying to raise an undefined name instead of an Exception in pythonwin/pywin/debugger/debugger.py (#2326, @Avasam)
  • Fixed PythonService DoLogMessage raising fatal GIL lock error (#2426, JacobNolan1)
  • Fixed and improved the following demos: ddeclient, ddeserver, EvtSubscribe_push, openGLDemo, guidemo, ocxserialtest, ocxtest, testMSOffice.TestWord8 (#2290, #2281, #2291, #2478 @Avasam)

adodbapi

  • Fixes NameError: name 'os' is not defined error for "getenv" macro in adodbapi.process_connect_string.macro_call (#2283, @Avasam)

Build 308, released 2024-10-12

  • Fix Pythonwin displaying syntax errors in Python 3.13 (#2393)
  • Allowed installs from source w/o having pywin32 pre-installed (for instance, from GitHub) (#2349, @Avasam)
  • Restored version stamping of installed DLLs (#2349, @Avasam)
  • Fixed a circular import between win32comext.axscript.client.framework and win32comext.axscript.client.error (#2381, @Avasam)
  • Remove long-deprecated win32com.server.dispatcher.DispatcherWin32dbg (#2382, @Avasam)

Build 307, released 2024-10-04

Release process changes

pywin32 is now released from artifacts created by Github actions, whereas previously they were created from an environment where certain tools and libraries were located and installed by hand.

This means some capabilities are no longer provided - this includes some documentation artifacts, such as the .chm file, certain MAPI libraries etc, and .exe installers.

pywin32

  • Remove obsolete and unused pywin.is_platform_unicode (#2343, @Avasam)
  • Fix isapi.ThreadPoolExtension's printing of exception traceback broken on Python 3.8+ (#2312, @Avasam)
  • Add RealGetWindowClass (#2299, @CristiFati)
  • Make it compile on Python 3.13 (#2260, @clin1234)
  • Fixed accidentally trying to raise a str instead of an Exception in (#2270, @Avasam)
    • pythonwin/pywin/debugger/debugger.py
    • pythonwin/pywin/framework/dlgappcore.py
    • com/win32com/server/policy.py
    • win32/Lib/regutil.py
    • win32/scripts/VersionStamp/vssutil.py
  • Removed the following unused symbols. They were meant to be used as Exceptions, but were accidentally strings (#2270, #2269, @Avasam)
    • pywin.debugger.debugger.error
    • pywin.framework.dlgappcore.error
    • win32com.server.policy.error
    • regutil.error
    • win32.scripts.VersionStamp.vssutil.error
    • win32com.universal.com_error
    • win32com.client.build.error
    • win32com.client.genpy.error
  • Add EnumDesktopWindows (#2219, @CristiFati)
  • Marked exc_type and exc_traceback in win32comext.axscript.client.error.AXScriptException.__init__ as deprecated. (#2236, @Avasam)
    They are now unused and all information is taken from the exc_value parameter.
  • Fixed non-overriden pywin.scintilla.formatter.Formatter.ColorizeString raising TypeError instead of RuntimeError due to too many parameters (#2216, @Avasam)
  • Fixed broken since Python 3 tokenization in win32comext.axdebug.codecontainer.pySourceCodeContainer.GetSyntaxColorAttributes (#2216, @Avasam)
  • Fixed a TypeError due to incorrect kwargs in win32comext.axscript.client.pydumper.Register (#2216, @Avasam)
  • Fixed error reporting of file copy failure for for installing debug dlls (#2216, @Avasam)
  • Fixed py.exe -m win32verstamp command and other quote typos caused by Implied String Concatenation (#2225, @Avasam)
  • Fixed tons of quote-related typos in strings, docs and comments (#2271 , @Avasam)
  • Fixed VT_SAFEARRAY(VT_RECORD) which were missing the last element (#2247)
  • Fixed MFC redist DLLs not found by preferring corresponding version but accepting different version (#2248, @andreabravetti)
  • Fixed pywintypes.error: (5, 'RegOpenKeyEx', 'Access is denied.') when running service with debug parameter and no elevation (#2238, @jmartens)
  • Fixed handling of SyntaxError exception from a Windows Scripting Host Python Script on Python 3.10+ (#2235, @nbbeatty)
  • Add CredGetSessionTypes support (#2232, @CristiFati)
  • Fixed win32clipboard increasing size of data when SetClipboardData used with CF_DIB (#2184, @CristiFati)
  • Add StoreLogoff to PyIMsgStore to prevent possible hang when MAPI uninitializes or during session logoff (#2196, @avivbrg)
  • Enhance CredDelete to work with dictionaries (#2198, @CristiFati)
  • Add UnregisterHotKey support (#2185, @CristiFati)
  • IFolderView COM client support (#2180, #2181, #2182, @CristiFati)
  • Release GIL when calling CreateService or StartService (#2062, @adamkbmc)
  • Drop support for Internet Explorer 10 (#2229, @Avasam)
  • Removed considerations for never-built Windows CE (#2218, @Avasam)
  • Stopped building winxpgui (#2217, @Avasam)
    • Raise DeprecationWarning when importing winxpgui
    • Added GetWindowRgnBox to win32gui
    • winxpgui.GetConsoleWindow now aliases win32console.GetConsoleWindow
    • Everything else is re-exported from win32gui
  • Fixed and improved the following demos: ietoolbar, fontdemo, msoffice, shell_view, context_menu, win32clipboardDemo (#2217, #2101, @Avasam)
  • Fixed undefined names reported by Flake8/Ruff (#2101, @Avasam, @kxrob)
    • Fixed the following public API:
      • Fixed NameError in WordFrame.Create, even though it wasn't used
      • Fixed a handful of NameError in pywin.dialogs.ideoptions.OptionsPropPage with format
      • Fixed AttributeError in pywin.framework.dlgappcore.AppDialog.OnPaint
      • Fixed trying to write banner to sdterr in pywin.framework.interact.InteractiveCore.Init
      • Fixed a NameError in pywin.framework.mdi_pychecker.TheDocument.doSearch
      • Removes unusable HandleToUlong, UlongToHandle, UlongToPtr and UintToPtr from pywin.scintilla.scintillacon
      • Fixed a NameError in win32comext.axscript.client.pydumper.Register
    • The following methods no longer throw errors (although their implementation is still unvalidated):
      • mmsystem.MEVT_EVENTTYPE
      • mmsystem.MEVT_EVENTPARM
      • mmsystem.MCI_MSF_MINUTE
      • mmsystem.MCI_MSF_SECOND
      • mmsystem.MCI_TMSF_TRACK
      • mmsystem.MCI_TMSF_MINUTE
      • mmsystem.MCI_TMSF_SECOND
      • mmsystem.MCI_TMSF_FRAME
      • mmsystem.MCI_HMS_HOUR
      • mmsystem.MCI_HMS_MINUTE
      • mmsystem.MCI_HMS_SECOND
      • mmsystem.DIBINDEX
      • winnt.IMAGE_SNAP_BY_ORDINAL
      • winnt.IMAGE_ORDINAL
  • Removed Unicode and UnicodeType from pywintypes and win32api (#2200, @Avasam)
  • Deprecate afxres in favor of pywin.mfc.afxres. The modules were identical (#2177, @Avasam)
  • Improved DispatcherWin32dbg's deprecation warning and raise an error when used (#2145, @Avasam)
  • Removed obsolete/legacy way of registering a Pythonwin app and its Idle handlers from pywin.framework.app (#2144, @Avasam)
  • Removed unused win32comext.axscript.server.error (#2202, @Avasam)
  • Removed deprecated win32com.server.exception.Exception (#2142, @Avasam)
  • Removed long-deprecated UnicodeToString param from multiple methods (#2143, @Avasam)
  • Fixed win32api.SetClassWord being overwritten by win32api.SetWindowWord (#2199, @Avasam)
    • If you were using win32api.SetClassWord for its current behaviour, use win32api.SetWindowWord instead.
    • This also adds missing support for win32api.SetWindowWord
  • Annotated module-level variables with ambiguous typing (#2175, @Avasam)
  • win32com.client.build.NoTranslateMap is now a set (#2176, @Avasam)
  • Fixed ModuleNotFoundError: No module named 'dialog' in pywin.tools.regpy (#2187, @Avasam)
  • Fixed passing a float to range in win32pdhquery.Query.collectdatafor (#2170, @Avasam)
  • Check that the filename w/o extension ends with _d rather than checking for _d anywhere in the file path (#2169, @Avasam)
  • Cleaned up and fixed Axdebug (#2126, @Avasam)
    • win32comext.axdebug.codecontainer.SourceCodeContainer now uses the debugDocument parameter
    • win32comext.axdebug.codecontainer script can now be run independent of location
    • Fixed Method Resolution Order issue in win32comext.axdebug.documents (also #2071, @wxinix-2022)
    • Fixed undefined names (NameError) in win32comext.axdebug.expressions.DebugProperty.GetPropertyInfo
    • Removed unused win32comext.axdebug.util.all_wrapped
    • Fixed multiple ModuleNotFoundError in win32comext.axdebug (#1983, @Avasam)
  • Change mbcs encoding to utf-8 in com.win32com.client (#2097, @Avasam)
  • Avoid using importlib directly (#2123, @Avasam)
  • Replace most usages of deprecated distutils:
    • Replace distutils.dep_util with setuptools.modified (#2148, @Avasam)
    • Replaced distutils.FileList usage with pathlib (#2138, @Avasam)
    • Replace distutils.log with logging (#2134, @Avasam)
    • Replace distutils with direct setuptools equivalents where possible (#2134, @Avasam)
  • Replaced usages of the removed (in Python 3.12) imp module (#2113, @Avasam)
    • Fixed registering Python as a scripting language for axscript
    • Fixed isapi install
  • Use collection literals and comprehensions where applicable (slight performance improvement) (#2108, @Avasam)
  • Cleanup obsolete code for unsupported Python versions (#1990, #2127, #2205, #2214, @Avasam)
    • The following public names have been removed:
      • pywin.framework.app.Win32RawInput
      • win32com.client.makepy.error
      • Long obsoleted dbi module, use the odbc module instead
      • win32com.client.dynamic.MakeMethod
    • Added support for the following Python 3 methods:
      • pywin.mfc.dialog.Dialog.__contains__
      • win32com.client.CoClassBaseClass.__bool__
      • win32com.client.combrowse.HLIRoot.__lt__
      • win32com.client.genpy.WritableItem.__lt__
      • __bool__ in classes generated by win32com.client.genpy.WritableItem.WriteClassBody
      • win32timezone._SimpleStruct.__le__ (subclassed by SYSTEMTIME, TIME_ZONE_INFORMATION, DYNAMIC_TIME_ZONE_INFORMATION, TimeZoneDefinition)
    • The following methods no longer throw errors (although their implementation is still unvalidated):
      • winnt.PRIMARYLANGID
      • winnt.SUBLANGID
      • winnt.LANGIDFROMLCID
      • winnt.SORTIDFROMLCID
  • Removed obsolete compatibility aliases (#2087, @Avasam) The following public names have been removed:
    • win32comext.mapi.mapiutil.TupleType
    • win32comext.mapi.mapiutil.ListType
    • win32comext.mapi.mapiutil.IntType
    • netbios.byte_to_int
  • Resolved invalid string escapes warnings (#2045, #2124, @Avasam)
  • Idiomatic type comparisons. Better handling of subclasses. (#1991, @Avasam)
  • Cleaned up obsolete and redundant code (this should not directly affect the end-user):
  • Small generalized optimization by using augmented assignments (in-place operators) where possible (#2274, @Avasam)
  • General speed and size improvements due to all the removed code. (#2046, #1986, #2050, #1950, #2085, #2087, #2051, #1990, #2106, #2127, #2124, #2126, #2177, #2218, #2202, #2205, #2217)

adodbapi

  • Remove references to outdated IronPython (#2049, @Avasam)
    This removes the following public names:
    • adodbapi.adodbapi.onWin32
    • adodbapi.apibase.onIronPython
    • adodbapi.apibase.NullTypes
    • adodbapi.apibase.DateTime
  • Remove references to outdated mxDateTime (#2048, @Avasam)
    This removes the following public names:
    • adodbapi.apibase.mxDateTime
    • adodbapi.apibase.mxDateTimeConverter
  • Removed obsolete Python 2 aliases (#2088, @Avasam)
    This removes the following public names:
    • adodbapi.adodbapi.unicodeType
    • adodbapi.adodbapi.longType
    • adodbapi.adodbapi.StringTypes
    • adodbapi.adodbapi.maxint
    • adodbapi.apibase.unicodeType
    • adodbapi.apibase.longType
    • adodbapi.apibase.StringTypes
    • adodbapi.apibase.makeByteBuffer
    • adodbapi.apibase.memoryViewType
  • Remove outdated and unused remote feature (#2098, @Avasam)
  • Migrated from distutils to setuptools (#2133, @Avasam)

Build 306, released 2023-03-26

  • Add GetSystemPowerStatus (#2010, @CristiFati)
  • Add CascadeWindows (#1999, @CristiFati)
  • Add win32gui.ResetDC
  • Fix leak in win32pdh.GetFormattedCounterArray
  • Fix IIS on later python versions (#2025)
  • Fix for service registration code updated in build 305 (#1985)
  • Support for Python 3.6 was dropped, support for later versions was improved.

Build 305, released 2022-11-06

  • Installation .exe files were deprecated.
  • @kxrob put a lot of work towards removing use of the deprecated Unicode API so we can build on Python 3.12. This should be largely invisible, but please report any unintended consequences.
  • odbc: Handle varchar(max)/nvarchar(max) column sizes (#1954)
  • win32api.GetTickCount() now returns an unsigned 64bit integer (@kxrob, #1946)
  • win32pipe.GetNamedPipeHandleState() now takes a 3rd optional param indicating whether the username should be returned, and related constants added. (@kxrob, #1946)
  • Add win32gui.GetTopWindow() and win32gui.GetAncestor() (#1928, @CristiFati)
  • Tweaks to how pywintypes searches for DLLs to better support virtualenvs created with --system-site-packages. (@saaketp, #1933)
  • Added win32event.CreateWaitableTimerExW (#1945, @zariiii9003)
  • Changes in PARAM handling. Some functions which returned a WPARAM or LPARAM allowed you to return a pointer to a Python buffer object or a PyUnicode. These functions now only accept a Python long to be returned. Note that this DOES NOT apply to functions with accept WPARAM or LPARAM as arguments, only when they are being returned. Impacted functions are OnNotify handler, LV_ITEM/TV_ITEM objects, PyIContextMenu3::HandleMenuMsg2, and the result of a WNDPROC/DLGPROC (#1927).
  • service registration had an overhaul, avoiding a complicated, and ultimately unnecessary "single globally registered service runner" concept. Now, when registering a service, the host pythonservice.exe runner will be copied to sys.exec_prefix, along with possibly pywintypesXX.dll and run from there. (#1908)
  • Dropped support for allowing a bytes object to be passed where a COM BSTR is expected - this support was accidental on the path from Python 2 -> 3.
  • win32crypt's PyCERTSTORE.CertCloseStore()'s Flags argument has been deprecated as it is likely to crash the process if CERT_CLOSE_STORE_FORCE_FLAG is specified. The underlying function is now always called with CERT_CLOSE_STORE_CHECK_FLAG, and support for this param will be dropped at some point in the future.
  • Fix a bug where win32crypt.CryptQueryObject() would return a PyCTL_CONTEXT object instead of a PyCERT_CONTEXT for base64 encoded certificates (#1859)
  • win32crypt.CryptQueryObject() is now able to return PyCTL_CONTEXT objects. This is technically a breaking change as previously it would return the address in memory of the object, but this address wasn't practically usable, so it's very unlikely anyone relied on this behavior. (#1859)

Build 304, released 2022-05-02

  • Fixed Unicode issues in the dde module (#1861, @markuskimius )
  • Add PRINTER_INFO_6 support for Set/GetPrinter (#1853, @CristiFati)
  • Fixed codepage/mojibake issues when non-ascii characters were included in COM exceptions raised by Python apps. This should be invisible, but might break any workarounds which were used, such as using specific encodings in these strings. (#1823, #1833)
  • Fixed a bug triggering win32print.SetJob to fail due to data type (char* / wchar_t*) mismatch (#1849, @CristiFati)
  • Fix eventlog initialization (#1845, #1846, @kxrob)

Build 303, released 2021-12-20

  • Tweaks to how DLLs are loaded and our installation found, which should improve virtualenv support and version mismatch issues (#1787, #1794)
  • Fixed a bug where win32clipboard.GetClipboardData() may have returned extra data.
  • Binary installers for 32-bit 3.10+ are no longer released (#1805)

Build 302, released 2021-10-11

  • Fixed support for unicode as a win32crypt.CREDENTIAL_ATTRIBUTE.Value
  • Support for Python 3.10, dropped support for Python 3.5 (3.5 security support ended 13 Sep 2020)
  • Merged win2kras into win32ras. In the unlikely case that anyone is still using win2kras, there is a win2kras.py that imports all of win32ras. If you import win2kras and it fails with 'you must import win32ras first', then it means an old win2kras.pyd exists, which you should remove.
  • GitHub branch 'master' was renamed to 'main'.

Build 301, released 2021-05-30

  • Fix some confusion on how dynamic COM object properties work. The old code was confused, so there's a chance there will be some subtle regression here - please open a bug if you find anything, but this should fix #1427.
  • COM objects are now registered with the full path to pythoncomXX.dll, fixes #1704.
  • Creating a win32crypt.CRYPT_ATTRIBUTE object now correctly sets cbData.
  • Add wrap and unwrap operations defined in the GSSAPI to the sspi module and enhance the examples given in this module. (#1692, Emmanuel Coirier)
  • Fix a bug in win32profile.GetEnvironmentStrings() relating to environment variables with an equals sign (@maxim-krikun in #1661)
  • Fixed a bug where certain COM dates would fail to be converted to a Python datetime object with ValueError: microsecond must be in 0..999999. Shoutout to @hujiaxing for reporting and helping reproduce the issue (#1655)
  • Added win32com.shell.SHGetKnownFolderPath() and related constants.
  • CoClass objects should work better with special methods like __len__ etc. (#1699)
  • Shifted work in win32.lib.pywin32_bootstrap to Python's import system from manual path manipulations (@wkschwartz in #1651)
  • Fixed a bug where win32print.DeviceCapabilities would return strings containing the null character followed by junk characters. (#1654, #1660, Lincoln Puzey)

Build 300, released 2020-11-14

  • Fixed a bug where win32com.client.VARIANT params were returned in the reverse order. This only happened when win32com.client.VARIANT was explicitly used (ie, not when normal params were passed) For example:

        arg1 = VARIANT(pythoncom.VT_R4 | pythoncom.VT_BYREF, 2.0)
    arg2 = VARIANT(pythoncom.VT_BOOL | pythoncom.VT_BYREF, True)
    object.SomeFunction(arg1, arg2)

    after this call, arg1.value was actually the value for arg2, and vice-versa (#1303, #622).

  • Fixed a bug that Pythonwin had an empty sys.argv (@kxrob in #1607)

  • Fixed a bug that prevented win32process.ReadProcessMemory() from working in all scenarios (#1599)

  • Changed how Services implemented with win32serviceutil.ServiceFramework report that they have stopped. Now if the SvcRun() method (or the SvcDoRun() method, which is called by SvcRun() by default) raises on Exception, the Service will report a final SERVICE_STOPPED status with a non-zero error code. This will cause the Service's recovery actions to be triggered if the Service has the "Enable actions for stops with errors" option enabled. (#1563, Lincoln Puzey)

  • adodbapi connect() method now accepts a "mode" keyword argument which is the "Mode" property to set on the ADO "Connection" object before opening the Connection. See "ConnectModeEnum" for valid values. (Lincoln Puzey)

  • The Windows 10 SDK is now used to build the project. This shouldn't cause any visible changes, but should make it much easier to build the project yourself.

Python 2 is no longer supported - so long, Python 2, you served us well!

Notable changes in this transition:

  • Python 3 builds used to erroneously turn "bytes" into a tuple of integers instead of a buffer type object. Because this special-casing is important for performance when using massive buffers, this has been fixed in Python 3 so it matches the old Python 2 behavior. If you use arrays of VT_UI1 and expect get back tuples of integers, your code may break.

  • Pythonwin's default encoding is now utf-8 (#1559)

  • The build environment has been greatly simplified - you just need Visual Studio and a Windows 10 SDK. (The free compilers probably work too, but haven't been tested - let me know your experiences!)

Previous

Build 228 (2020-06-13) was the last to support Python 2.0.

Older entries are periodically removed - see the git history of this file for them.