config.py 文件源码

def validate_ip_network_address_prefix(address, prefix, strict=True):
    '''
    If address/prefix is a valid IP network when parsed according to strict,
    return it as an ipnetwork object.
    Otherwise, return None.
    '''
    ip_address = validate_ip_address(address)
    if ip_address is None or ip_address.version not in [4,6]:
        return None
    try:
        if ip_address.version == 4:
            return ipaddress.IPv4Network((ip_address, prefix), strict=strict)
        else:
            return ipaddress.IPv6Network((ip_address, prefix), strict=strict)
    except ValueError:
        return None