Example of a function to determine the country code of a phone number. Based on the python port of Google's libphonenumber project: https://github.com/daviddrysdale/python-phonenumbers

determine_country.py

"""
Example of a function to determine the country code of a phone number.
Based on the python port of Google's libphonenumber project:
https://github.com/daviddrysdale/python-phonenumbers
"""
import phonenumbers as ph

def get_country_code(phone_number):
    """Returns the ISO 3166-1 alpha-2 code for a phone number

    May also return None or ZZ for invalid regions

    Arguments:
    phone_number -- A phone number in any format as a string

    >>> get_country_code("+18085551234")
    'US'
    >>> get_country_code("+12505551234")
    'CA'
    >>> get_country_code("(707) 555-1234")
    'US'
    >>> get_country_code("1 514-555-1234")
    'CA'
    >>> get_country_code("+81355555555")
    'JP'
    """
    number_object = ph.parse(phone_number, region="US")
    return ph.region_code_for_number(number_object)

# To run the tests, uncomment this section and run
#if __name__ == "__main__":
#    import doctest
#    doctest.testmod()