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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def _IsWindowsDrivePathSegment(cls, path_segment):
 """Determines if the path segment contains a Windows Drive indicator. A drive indicator can be a drive letter or %SystemDrive%. Args: path_segment (str):
 path segment. Returns: bool: True if the path segment contains a Windows Drive indicator. """

    if (len(path_segment) == 2 and path_segment[1] == ':' and
        path_segment[0].isalpha()):
      return True

    path_segment = path_segment.upper()
    return path_segment in ('%%ENVIRON_SYSTEMDRIVE%%', '%SYSTEMDRIVE%')