@classmethod
    def isBank(cls, s):
        if not s:
            return False
        si = s.replace('.', '')
        if not cls.isinteger(si):
            return False
        return len(si) == 9
Turn a netmask/hostmask string into a prefix length
dataset/ETHPy150Open petrvanblokland/Xierpa3/xierpa3/toolbox/parsers/validator.py/Validator.isBank--crossover with--dataset/ETHPy150Open anzev/hedwig/build/pip/pip/_vendor/ipaddress.py/_IPAddressBase._prefix_from_ip_string