def _is_viable_phone_number(number):
    if len(number) < _MIN_LENGTH_FOR_NSN:
        return False
    match = fullmatch(_VALID_PHONE_NUMBER_PATTERN, number)
    return bool(match)
Runs Markdown over a given value, optionally using various
dataset/ETHPy150Open daviddrysdale/python-phonenumbers/python/phonenumbers/phonenumberutil.py/_is_viable_phone_number--crossover with--dataset/ETHPy150Open AppScale/appscale/AppServer/lib/django-1.4/django/contrib/markup/templatetags/markup.py/markdown