python条件判断列表值是否大于255，输出不对

问题遇到的现象和发生背景

python条件判断列表值是否大于255，输出不对，输入192.168.1.256 和0后应该有print打印

问题相关代码，请勿粘贴截图

def ip_panduan(ip_name,panduan):
        ip2=["255","255","255","255"]
        if int(panduan)==0:
                ip1=ip_name
                cut_ip_stip=ip1.split(".")
                if len(cut_ip_stip)!=4:
                        print ("ip is not ok")
                        return 0
                else:
                        for x in range(len(ip2)+1):
                                if not cut_ip_stip[x].isdigit():
                                        print("you input is wrong")
                                        return 0
                                print x
                                print (cut_ip_stip[x])
                                print (ip2[x])
                                if int(cut_ip_stip[x]) > int(ip2[x]):
                                        return 0
                                        print("please duan zheng you taidu")
        else:
                print ("you input gw")
ip_name=raw_input("please input you ip: ")
panduan=raw_input("please input 0 or 1,0 is ip,1 is gw :")
ip_panduan(ip_name,panduan)

运行结果及报错内容

python ip.py
please input you ip: 192.168.1.256
please input 0 or 1,0 is ip,1 is gw :0
0
192
255
1
168
255
2
1
255
3
256
255

我想要达到的结果

没有 print("please duan zheng you taidu")输出

print("please duan zheng you taidu"）写到return上面