netutils.py 文件源码

def is_valid_cidr(address):
    """Verify that address represents a valid CIDR address.

    :param address: Value to verify
    :type address: string
    :returns: bool

    .. versionadded:: 3.8
    """
    try:
        # Validate the correct CIDR Address
        netaddr.IPNetwork(address)
    except (TypeError, netaddr.AddrFormatError):
        return False

    # Prior validation partially verify /xx part
    # Verify it here
    ip_segment = address.split('/')

    if (len(ip_segment) <= 1 or
            ip_segment[1] == ''):
        return False

    return True