def _is_leading_zero_possible(country_code):
    """Checks whether the country calling code is from a region whose national
    significant number could contain a leading zero. An example of such a
    region is Italy.  Returns False if no metadata for the country is found."""
    region_code = region_code_for_country_code(country_code)
    metadata = PhoneMetadata.metadata_for_region_or_calling_code(country_code, region_code)
    if metadata == None:
        return False
    return metadata.leading_zero_possible
dataset/ETHPy150Open daviddrysdale/python-phonenumbers/python/phonenumbers/phonenumberutil.py/_is_leading_zero_possible/operator `is` -> `==`