def region_code_for_number(numobj):
    country_code = numobj.country_code
    regions = COUNTRY_CODE_TO_REGION_CODE.get(country_code, None)
    if regions is None:
        return None

    if len(regions) == 1:
        return regions[0]
    else:
        return _region_code_for_number_from_list(numobj, regions)
Called when we are about to execute the LU.
dataset/ETHPy150Open daviddrysdale/python-phonenumbers/python/phonenumbers/phonenumberutil.py/region_code_for_number--crossover with--dataset/ETHPy150Open ganeti/ganeti/lib/mcpu.py/OpExecCbBase.NotifyStart