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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 Name(self, number):
 """Returns a string containing the name of an enum value."""

    if number in self._enum_type.values_by_number:
      return self._enum_type.values_by_number[number].name
    raise ValueError('Enum %s has no name defined for value %d' % (
        self._enum_type.name, number))