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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 reset_to_coefficients(self):
 """ Keeps only the coefficient. This can be used to recalculate the IO tables for a new finald demand. Note ----- The system can not be reconstructed after this steps because all absolute data is removed. Save the Y data in case a reconstruction might be necessary. """

        # Development note: The coefficient attributes are
        # defined in self.__coefficients__
        [setattr(self, key, None)
         for key in self.get_DataFrame(
             data=False,
             with_unit=False,
             with_population=False)
         if key not in self.__coefficients__]
        return self