Utils.py 文件源码

def unversioned_sys_platform():
    """
    Return the unversioned platform name.
    Some Python platform names contain versions, that depend on
    the build environment, e.g. linux2, freebsd6, etc.
    This returns the name without the version number. Exceptions are
    os2 and win32, which are returned verbatim.

    :rtype: string
    :return: Unversioned platform name
    """
    s = sys.platform
    if s.startswith('java'):
        # The real OS is hidden under the JVM.
        from java.lang import System
        s = System.getProperty('os.name')
        # see http://lopica.sourceforge.net/os.html for a list of possible values
        if s == 'Mac OS X':
            return 'darwin'
        elif s.startswith('Windows '):
            return 'win32'
        elif s == 'OS/2':
            return 'os2'
        elif s == 'HP-UX':
            return 'hp-ux'
        elif s in ('SunOS', 'Solaris'):
            return 'sunos'
        else: s = s.lower()

    # powerpc == darwin for our purposes
    if s == 'powerpc':
        return 'darwin'
    if s == 'win32' or s == 'os2':
        return s
    return re.split('\d+$', s)[0]