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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 asDatetime(self, tzinfo=None):
 """Return this time as an aware datetime.datetime instance. The returned datetime object has the specified tzinfo, or a tzinfo describing UTC if the tzinfo parameter is None. """

        if tzinfo is None:
            tzinfo = FixedOffset(0, 0)

        if not self.isTimezoneDependent():
            return self._time.replace(tzinfo=tzinfo)
        else:
            return self._time.replace(tzinfo=FixedOffset(0, 0)).astimezone(tzinfo)