utils.py 文件源码

def normalize_ip_to_string(ipaddr):
    """Normalizes an IP address to a a sortable string.

    When sending IP addresses to a browser and asking JavaScript to sort them
    as strings, this function will help.

    An IPv4 address will be normalized to '4' + <15-character dotted quad>.
    An IPv6 address will be normalized to '6' + <39 character IPv6 address>

    """
    try:
        ipaddr = IP(ipaddr)
    except ValueError:
        return ipaddr

    if ipaddr.version() == 4:
        quad = str(ipaddr).split('.')
        return '4%s' % '.'.join([i.zfill(3) for i in quad])
    else:
        return '6%s' % ipaddr.strFullsize()