将IP转换为16进制，用于IPv4-IPv6

# --*-- coding: utf-8 --*--
# create by xiaocaiji

while 1:
    str_ip = input("input a IP:")
    list_ip = str_ip.split('.')
    if len(list_ip) < 4:
        print("error IP")
    x = 0
    try:
        for i in list_ip:
            if int(i) > 256:
                print("error IP")
                x += 1
            elif int(i) < 0 :
                print("error IP")
                x += 1
    except ValueError:
        print("error IP")
    else:
        if x > 0:
            continue
        a = hex(int(list_ip[0]) * 256 + int(list_ip[1]))
        b = hex(int(list_ip[2]) * 256 + int(list_ip[3]))
        a_new = a.replace('0x','')
        b_new = b.replace('0x','')
        while len(a_new) < 4:
            a_new = '0' + a_new
            #if len(a_new) == 4 :
            #    break
            # print(a_new)
        while len(b_new) < 4:
            b_new = '0' + b_new
            #if len(b_new) == 4 :
            #    break
            # print(b_new)
        print("%s:%s"%(a_new.upper(),b_new.upper()))