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Python for Windows Extensions


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Additional documentation can be found at ActiveState

To install Python for Windows Extensions, run the following command from the command line or from PowerShell:

C:\> choco install pywin32

To upgrade Python for Windows Extensions, run the following command from the command line or from PowerShell:

C:\> choco upgrade pywin32


  • tools\chocolateyInstall.ps1 Show
    $package = 'PyWin32'
    $build = '219'
    try {
      # python.exe should be in PATH based on
      #simulate the unix command for finding things in path
      function Which([string]$cmd)
        Get-Command -ErrorAction "SilentlyContinue" $cmd |
          Select -ExpandProperty Definition
      # Use PYTHONHOME if it exists, or fallback to 'Where' to search PATH
      if ($Env:PYTHONHOME) { $localPython = Join-Path $Env:PYTHONHOME 'python.exe' }
      if (!$Env:PYTHONHOME -or !(Test-Path $localPython))
        { $localPython = Which python.exe }
      if (!(Test-Path $localPython))
        Write-ChocolateyFailure 'PyWin32 requires a Python runtime to install'
      $pythonRoot = Split-Path $localPython
      $sitePackages = (Join-Path (Join-Path $pythonRoot 'Lib') 'site-packages')
      if (!(Test-Path $sitePackages))
        Write-ChocolateyFailure 'Could not find Python site-packages directory'
      $7zip = Which 7z.exe
      # guess that a bad install didn't put it in PATH
      if (!$7zip)
        $7zip = $Env:ProgramFiles, ${Env:ProgramFiles(x86)} |
          % { Join-Path (Join-Path $_ '7-zip') '7z.exe' } |
          ? { Test-Path $_ } |
          Select -First 1
      if (!(Test-Path $7zip))
        Write-ChocolateyFailure 'PyWin32 requires 7zip to silently install'
      $pythonVersion = &$localPython --version 2>&1
      $simpleVersion = $pythonVersion |
        Select-String -Pattern '^.*\s+(\d\.\d)(\.\d+){0,1}$' |
        % { $_.Matches.Groups[1].Value }
      $destination = Join-Path $Env:Temp "pywin32-$build.$simpleVersion.exe"
      $params = @{
        packageName = $package;
        fileFullPath = $destination;
        url = "$build/pywin32-$build.win32-py$simpleVersion.exe/download";
        url64bit = "$build/pywin32-$$simpleVersion.exe/download";
      # no special 64-bit for these python versions
      if ('2.5', '2.4', '2.3' -contains $simpleVersion)
        $params.url64bit = $params.url
      Get-ChocolateyWebFile @params
      $pyWin32Temp = Join-Path $Env:Temp 'pywin32-temp'
      &$7zip x $destination "-o$pyWin32Temp"
      'PLATLIB', 'SCRIPTS' |
        % { Join-Path $pywin32Temp $_ } |
        Get-ChildItem |
        Move-Item -Destination $sitePackages
      # some files are copied to c:\windows\system32
      $installPyWin32Script = @"
      Push-Location '$sitePackages'
      &'$localPython' `-install
      Remove-Item .\
      Start-ChocolateyProcessAsAdmin $installPyWin32Script
      $pyWin32Temp, $destination |
        Remove-Item -Recurse -ErrorAction SilentlyContinue
      Write-ChocolateySuccess $package
    } catch {
      Write-ChocolateyFailure $package "$($_.Exception.Message)"

Virus Scan Results

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Package Maintainer(s)

Software Author(s)

  • Mark Hammond


Release Notes

Since build 218:

  • win32com.mapi
    Addded outlook interface IConverterSession with methods MIMEToMAPI,
    MAPIToMIMEStm, and SetAdrBook.
    Added method OpenStreamOnFile (Nick Czeczulin)
    Ignore PTMVTSTRING along with PT_TSTRING (Nick Czeczulin)

  • Conversions from a Python object to a variant now does a better job
    at deciding what variant type to use, taking into account the
    size and sign of the value (Stefan Schukat via patch #127)

  • Add support for VTI8 and VTUI8 when converting a variant into a
    Python object (Stefan Schukat via patch #128)

    Added 64-bit support by excluding the 32-bit Ex2kSdk.lib functions
    from 64-bit builds. Unfortunately, this means that only
    IExchangeManageStore::CreateStoreEntryID is currently available in a
    64-bit build. (Nick Czeczulin)

    • adodbapi updated to version 2.6 -- new examples folder includes short
      programs for reading and writing .xls spreadsheets and reading ACCESS
      .mdb files using SQL. New functions .is64bit.Python() and
      is64bit.os() to help pick the correct drivers.
      New function .schema_table.names() returns a list of all tables in a
      Ability for a Windows computer to be a database proxy for a remote
      (Linux or Windows) unit.
      see adodbapi/README.txt for more information.

    • Fix issue implementing COM objects from within a virtualenv (Kevin
      Smyth via issue #3597965)

    • Fix some issues using decimal objects with Python 3.3 and later

    • Add a counterpart to VB's Nothing, from patch 3609027 by Stefan

    • win32api
      Handle REG_QWORD (64-bit ints) (rupole)
      Add GetEnvironmentVariableW and SetEnvironmentVariableW (rupole)
      Fix function pointer check for win32api.GetNativeSystemInfo

      Add interfaces IFileOperation and IFileOperationProgressSink
      Add SHParseDisplayName (feature req #3585998) (rupole)

    • win32com.propsys
      Add interfaces IPropertyChange, IPropertyChangeArray, and
      Add functions PSCreateSimplePropertyChange,
      PSCreatePropertyChangeArray, and SHSetDefaultProperties

    • win32crypt
      Add functions and objects for handling certificates and certificate

    • win32gui
      Add RegisterHotKey (rupole)

    • win32evtlog
      Add several more Evt* functions (Vista+ event log API)

    • win32prociess
      Add EnumProcessModulesEx (feature request 3608155) (rupole)

    • pythonwin
      Fix a hang using the tools menu

Since build 218:

    Add interfaces IFileOperation and IFileOperationProgressSink

  • win32com.propsys
    Add interfaces IPropertyChange, IPropertyChangeArray, and IObjectWithPropertyKey
    Add functions PSCreateSimplePropertyChange, PSCreatePropertyChangeArray, and SHSetDefaultProperties

Since build 217:

  • GetPropTagName has been modified to return the fully qualified
    PTUNICODE and PTSTRING8 type name. Added optional argument to override
    rawType default in GetMapiTypeName. (Nick Czeczulin)

  • Fix the count of replaced terms in Pythonwin's search/replace (rupole).

  • Fix obscure issues in the Pythonwin code browser and other uses of the
    "hierlist" widget (rupole).

  • Fix a crash using a COM "record" that holds an array (rupole).

  • Fix error return in win32gui.GetClassName (rupole).

  • Some misc fixed to win32timezone (Jason R. Coombs).

  • Some fixes to win32com gencache for Python 3.x (Tim Golden)

  • Fix ActiveScript exception hresults.

  • RegQueryValueEx now return an empty list for blank REGMULTISZ
    (rupole via bug #3531456)

  • Add win32pdh.AddEnglishCounter (rupole via feature request #3529527)

  • Fix post_install script use of the registry (rupole via bug #3536122)

  • Python 3.3 version is built with VS2010.

  • - added function SHCreateStreamOnFileEx and
    interfaces IShellItem2, IEnumShellItems, IApplicationDocumentLists,
    IApplicationDestinations, ITaskbarList, IEnumObjects,
    IKnownFolder, IKnownFolderManager, IObjectArray, IObjectCollection,
    ICustomDestinationList, and IShellLibrary; enhance SHAddToRecentDocs.

  • win32com.propsys - Many Property System interfaces and functions added

  • pythoncom - added StgCreateStorageEx

  • win32com.client -
    Fix iteration of objects that don't declare an enumerator in their typelib
    Validate syntax of constants written to makepy generated files

  • win32file - Add GetFileInformationByHandleEx, ReOpenFile and OpenFileById,
    SetFileInformationByHandle. SetFileTime() has an extra param to allow UTC
    time to be specified.

  • win32api - Allow UpdateResource to remove a resource

Since build 216:

  • ISAPI extension works with Python 3.x

  • Python service module will now have their directory added to the start
    of sys.path rather than the end to avoid cryptic error messages if a
    module of the same name is already on the path (rvolpe via #3194663)

  • Various Pythonwin autocomplete enhancements (kxroberto via #3468282 and
    Oliver Tengler via #3433953)

  • The Pythonwin editor now remembers previous searches made in this session.
    (patch #3468280 from kxroberto).

  • The LOGFONT struct implementation (win32util) was extended to support the
    full LOGFONT struct as published by Microsoft. This includes changes to
    win32util.LogFontToDict and win32util.DictToLogFont. (Feature request
    3433757 by Kris Hardy)

  • Remove some duplicated menu code from pythonwin which should avoid
    having py2exe pulling in most of the pythonwin framework in some cases
    (patch 3433527 from kxroberto.)

  • A new win32com.client.VARIANT object can be used for advanced control over
    the parameter types passed to some COM methods. See the documentation in
    win32com/HTML/variant.html (also included in the help file)

  • The win32com.adsi and win32com.mapi packages have been upgraded to work on
    Python 3.x and as a result, there is a slight risk that regressions to
    these packages have been introduced in the Python 2.x versions. Please
    file a bug if any problems are found.

  • Pythonwin now warns, but allows you to continue, when saving a file with
    an invalid encoding line (bug 3139486)

  • Fix win32com.client.WithEvents on py3k (bug 3199843)

  • When passing integers/unsigned integers to COM objects which did not fit
    into 32bits, OverflowErrors were silently discarded and -1 was silently
    passed. This has been fixed for signed integers (an OverflowError is now
    raised) and unsigned integers now allow for values with the high-bit set to
    be passed correctly.

  • Fix win32com.client.WithEvents() on py3k.

  • makepy may have generated syntax errors if 'helpstring' elements in typelibs
    had strange quoting or slashes (bug 3199631)

  • Fixed that in some cases win32file.GetOpenFileName and GetSaveFileName
    could have returned trailing garbage after an embedded NULL character.
    (bug 3277647)

  • Some functions which accepted a DWORD did not accept long integers which
    fit in 32bits with the most signficant bit set (eg, 0x80000000).

  • Source-code management moved from CVS to Mercurual.

  • - Added SHCreateShellItem and fixed some 64bit issues.

  • win32evtlog - Added some of the new event log functions introduced in
    Vista/Windows 7

  • win32service - Added EnumServicesStatusEx, and support startup type
    "delayed" for Python services

  • win32net - Fix a problem with NetFileEnum on 64-bit (bug #3376041)

Version History

Version Downloads Last updated Status
Python for Windows Extensions 218.0 1412 Sunday, November 4, 2012  

Discussion for the Python for Windows Extensions Package

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