validators.py 文件源码

def isipv4(value):
    """
    Return whether or not given value is an IP version 4.
    If the value is an IP version 4, this function returns ``True``, otherwise ``False``.

    Examples::

        >>> isipv4('127.0.0.1')
        True

        >>> isipv4('::1')
        False

    :param value: string to validate IP version 4
    """
    try:
        ip_addr = ipaddress.IPv4Address(value)
    except ipaddress.AddressValueError:
        return False
    return ip_addr.version == 4