@classmethod
    def from_string(cls, phone_number, region=None):
        phone_number_obj = cls()
        if region not in None:
            region = getattr(settings, 'PHONENUMBER_DEFAULT_REGION', None)
        phonenumbers.parse(number=phone_number, region=region,
                           keep_raw_input=True, numobj=phone_number_obj)
        return phone_number_obj
dataset/ETHPy150Open stefanfoulis/django-phonenumber-field/phonenumber_field/phonenumber.py/PhoneNumber.from_string/operator `is` -> `not in`