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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 _fix_time(self, dt):
 """Stackdistiller converts all times to utc. We store timestamps as utc datetime. However, the explicit UTC timezone on incoming datetimes causes comparison issues deep in sqlalchemy. We fix this by converting all datetimes to naive utc timestamps """

        if dt.tzinfo is not None:
            dt = dt.replace(tzinfo=None)
        return dt