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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 _gmtime(timestamp):
 """Custom gmtime because yada yada. """

    try:
        return time.gmtime(timestamp)
    except OSError:
        dt = datetime.datetime(1970, 1, 1) + datetime.timedelta(seconds=timestamp)
        dst = int(_isdst(dt))
        return time.struct_time(dt.timetuple()[:8] + tuple([dst]))