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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 get_last_traded_dt(self, asset, dt, data_frequency):
 """ Given an asset and dt, returns the last traded dt from the viewpoint of the given dt. If there is a trade on the dt, the answer is dt provided. """

        return self._get_pricing_reader(data_frequency).get_last_traded_dt(
            asset, dt)