Erase the contents of the object

def clear(self):
        """Erase the contents of the object"""
        self.country_code = None
        self.national_number = None
        self.extension = None
        self.italian_leading_zero = None
        self.number_of_leading_zeros = None
        self.raw_input = None
        self.country_code_source = CountryCodeSource.UNSPECIFIED
        self.preferred_domestic_carrier_code = None