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This package was approved as a trusted package on 5/1/2015.

Python is a programming language that lets you work more quickly and integrate your systems more effectively. You can learn to use Python and see almost immediate gains in productivity and lower maintenance costs.


This package installs the latest stable version of Python. It will install to Python to $env:ChocolateyBinRoot\python, but only if Python is not already installed where the installer puts it by default, which is $env:SystemDrive\PythonXX (XX stands for the major/minor version digits).

This package is not intended to use with Chocolatey’s -x86 parameter. If you want a 32-bit Python on 64-bit systems, install the python-x86_32 package instead. You can also install both packages. In this case you must manually adapt your PATH environment variable so that it picks the Python version that you want when invoking python.exe.

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

C:\> choco install python

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

C:\> choco upgrade python


  • tools\chocolateyInstall.ps1 Show
    # This file should be identical for all python* packages
    $packageName = 'python'
    $url = ''
    $url64 = ''
    $version = '3.4.3'
    $fileType = 'msi'
    $partialInstallArgs = '/qn /norestart ALLUSERS=1 TARGETDIR='
      $binRoot = Get-BinRoot
      $installPath = Join-Path $binRoot $packageName
      # The name of the installed Python version from Win32_Product
      $win32ProductName = $('^Python' + ' ' + [regex]::escape($version) + '$')
      # The Get-ProcessorBits is a misnomer. It returns the OS bitness, not the CPU bitness
      $osBitness = Get-ProcessorBits
      # If the OS is 64-bit and the package is not Python 32-bit specific,
      # it detects only an installed 64-bit version. This is incompatible with
      # the usage of the '-x86' parameter of Chocolatey, but I know no other
      # method to do this. Therefore I also created 32-bit specific Python packages
      # (python-x86_32 in this case).
      if (($osBitness -eq 64) -and ($packageName -notmatch 32)) {
        $win32ProductName = $('^Python' + ' ' + [regex]::escape($version) + ' ' + '\(64-bit\)$')
      # Check if the same version and bitness of Python is already installed
      $sameVersionAlreadyInstalled = Get-WmiObject -Class Win32_Product |
        Where-Object {$_.Name -match $win32ProductName}
      # Construct the old installation path, which is mostly C:\PythonXX,
      # where XX stands for the major and minor version digits.
      $versionMajorMinor = $version -replace '^(\d+)\.(\d+).*', '$1$2'
      $oldInstallPath = Join-Path $env:SystemDrive "Python$versionMajorMinor"
      if (Test-Path $oldInstallPath) {
        $installPath = $oldInstallPath
        Write-Host @"
    Warning: Old installation path “$oldInstallPath” detected.
    This package will continue to install $packageName there unless you uninstall
    $packageName from there and remove the “$oldInstallPath” folder. If you decide
    to do that, reinstall this package with the -force parameter and it will
    install to the Chocolatey bin root.
      $installArgs = $($partialInstallArgs + '"' + $installPath + '"')
      # Check if the same version of Python is already installed.
      # This prevents 1603 errors during the installation and an
      # unnecessary download of the Python installer.
      if ($sameVersionAlreadyInstalled) {
        Write-Host @"
    $packageName v$version is already installed. Skipping unnecessary download
    and installation. If you have installed $packageName in “$oldInstallPath”
    and you want to use the Chocolatey bin root as installation path instead,
    uninstall $packageName from the control panel, remove the “$oldInstallPath”
    folder and reinstall this package with the -force parameter.
      } else {
        # Otherwise install Python and and add the installation folder to the PATH.
        # If the package is only intended for the 32-bit version, only pass
        # the 32-bit version to the install package function.
        if ($packageName -match 32) {
          Install-ChocolateyPackage $packageName $fileType $installArgs $url
        } else {
          Install-ChocolateyPackage $packageName $fileType $installArgs $url $url64
        Install-ChocolateyPath $installPath 'Machine'
        $env:Path = "$($env:Path);$installPath"


This package has no dependencies.


Sofware Author(s)


Release Notes

2015-05-01: Fixed install parameters which broke the package, removed deprecated try/catch

Version History

Version Downloads Last updated Status
Python 3.4.3 3662 Wednesday, February 25, 2015 approved
Python 3.4.2 10951 Wednesday, October 8, 2014 approved
Python 433 Saturday, October 4, 2014 approved
Python 5199 Tuesday, June 10, 2014 approved
Python 3.4.1 257 Saturday, June 7, 2014 approved
Python 3368 Tuesday, March 25, 2014 approved
Python 3.4.0 629 Monday, March 17, 2014 approved
Python 2.7.10 272 Saturday, October 10, 2015 approved
Python 2.7.6 10181 Monday, November 11, 2013 approved
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  • This discussion will carry over multiple versions. If you have a comment about a particular version, please note that in your comments.
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  • Tell us what you love about the package or Python, or tell us what needs improvement.
  • Share your experiences with the package, or extra configuration or gotchas that you've found.

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