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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 datetime( self, year, month, day, hour=0, minute=0, second=0, microsecond=0 ):
 # type: (int, int, int, int, int, int, int) -> datetime """ Return a normalized datetime for the current timezone. """

        if _HAS_FOLD:
            return self.convert(
                datetime(year, month, day, hour, minute, second, microsecond, fold=1)
            )

        return self.convert(
            datetime(year, month, day, hour, minute, second, microsecond),
            dst_rule=POST_TRANSITION,
        )