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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 parsedate_tz(data):
 """Convert a date string to a time tuple. Accounts for military timezones. """

    res = _parsedate_tz(data)
    if not res:
        return
    if res[9] is None:
        res[9] = 0
    return tuple(res)