如何在某些字符前后拆分字符串？

Question

I have an assignment to create a python program that will receive an IP address and check if its valid or not, my problem is I dont know how to split the input so I will be able to check each octet whether its between 0 - 255 or not?

Answer 1

You want to use the "split()" method.

ip = "192.68.10.10"

ip_arr = ip.split(".")

print(ip_arr)

This will return an array containing the 4 numbers:

['192', '68', '10', '10']

You can then loop through the array to check if each value is under 256. (Don't forget to convert to int before checking)

Answer 2

Don't parse it. There's already a much more powerful library for that. From this answer:

import socket

try:
    socket.inet_aton(addr)
    # legal
except socket.error:
    # Not legal