revision, build number, build date/time as string and the compiler
        identification string.

        Note that unlike the Python sys.version, the returned value
        for the Python version will always include the patchlevel (it
        defaults to '.0').

        The function returns empty strings for tuple entries that
        cannot be determined.

        sys_version may be given to parse an alternative version
        string, e.g. if the version was read from a different Python
        interpreter.

    NZ
IronPythonz*failed to parse IronPython sys.version: %sr