ipv4address.py 文件源码

def __init__(self, address):
        if not isinstance(address, basestring):
            message = "Invalid type used in IP initilization: '{}'. Must use a string"
            raise TypeError(message.format(type(address).__name__))
        if isinstance(address, str):
            address = unicode(address)
        try:
            super(IPv4Address, self).__init__(address)
        except ipaddress.AddressValueError as e:
            raise ValueError(e)