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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 get_complete_version(version=None):
 """Returns a tuple of the graphql version. If version argument is non-empty, then checks for correctness of the tuple provided. """

    if version is None:
        from graphql import VERSION as version
    else:
        assert len(version) == 5
        assert version[3] in ("alpha", "beta", "rc", "final")

    return version