(compilers: CompilersDict)
return os_arch
Detecting the 'native' architecture of Windows is not a trivial task. We
    cannot trust that the architecture that Python is built for is the 'native'
    one because you can run 32-bit apps on 64-bit Windows using WOW64 and
    people sometimes install 32-bit Python on 64-bit Windows.

    We also can't rely on the architecture of the OS itself, since it's
    perfectly normal to compile and run 32-bit applications on Windows as if
    they were native applications. It's a terrible experience to require the
    user to supply a cross-info file to compile 32-bit applications on 64-bit
    Windows. Thankfully, the only way to compile things with Visual Studio on
    Windows is by entering the 'msvc toolchain' environment, which can be
    easily detected.

    In the end, the sanest method is as follows:
    1. Check environment variables that are set by Windows and WOW64 to find out
       if this is x86 (possibly in WOW64), if so use that as our 'native'
       architecture.
    2. If the compiler toolchain target architecture is x86, use that as our
      'native' architecture.
    3. Otherwise, use the actual Windows architecture
Detecting the 'native' architecture of Windows is not a trivial task. We
    cannot trust that the architecture that Python is built for is the 'native'
    one because you can run 32-bit apps on 64-bit Windows using WOW64 and
    people sometimes install 32-bit Python on 64-bit Windows.
Detecting the native architecture of Windows is not a trivial task . We cannot trust that the architecture that Python is built for is the native one because you can run 32 - bit apps on 64 - bit Windows using WOW64 and people sometimes install 32 - bit Python on 64 - bit Windows .
def detect_windows_arch(compilers: CompilersDict) -> str:
    """
    Detecting the 'native' architecture of Windows is not a trivial task. We
    cannot trust that the architecture that Python is built for is the 'native'
    one because you can run 32-bit apps on 64-bit Windows using WOW64 and
    people sometimes install 32-bit Python on 64-bit Windows.

    We also can't rely on the architecture of the OS itself, since it's
    perfectly normal to compile and run 32-bit applications on Windows as if
    they were native applications. It's a terrible experience to require the
    user to supply a cross-info file to compile 32-bit applications on 64-bit
    Windows. Thankfully, the only way to compile things with Visual Studio on
    Windows is by entering the 'msvc toolchain' environment, which can be
    easily detected.

    In the end, the sanest method is as follows:
    1. Check environment variables that are set by Windows and WOW64 to find out
       if this is x86 (possibly in WOW64), if so use that as our 'native'
       architecture.
    2. If the compiler toolchain target architecture is x86, use that as our
      'native' architecture.
    3. Otherwise, use the actual Windows architecture

    """
    os_arch = detect_native_windows_arch()
    if os_arch == 'x86':
        return os_arch
    # If we're on 64-bit Windows, 32-bit apps can be compiled without
    # cross-compilation. So if we're doing that, just set the native arch as
    # 32-bit and pretend like we're running under WOW64. Else, return the
    # actual Windows architecture that we deduced above.
    for compiler in compilers.values():
        if compiler.id == 'msvc' and (compiler.target == 'x86' or compiler.target == '80x86'):
            return 'x86'
        if compiler.id == 'clang-cl' and compiler.target == 'x86':
            return 'x86'
        if compiler.id == 'gcc' and compiler.has_builtin_define('__i386__'):
            return 'x86'
    return os_arch
def detect_windows_arch ( compilers : CompilersDict ) -> str : os_arch = detect_native_windows_arch ( ) if os_arch == 'x86' : return os_arch # If we're on 64-bit Windows, 32-bit apps can be compiled without # cross-compilation. So if we're doing that, just set the native arch as # 32-bit and pretend like we're running under WOW64. Else, return the # actual Windows architecture that we deduced above. for compiler in compilers . values ( ) : if compiler . id == 'msvc' and ( compiler . target == 'x86' or compiler . target == '80x86' ) : return 'x86' if compiler . id == 'clang-cl' and compiler . target == 'x86' : return 'x86' if compiler . id == 'gcc' and compiler . has_builtin_define ( '__i386__' ) : return 'x86' return os_arch