1108. Defanging an IP Address-IP 地址无效化

Given a valid (IPv4) IP address, return a defanged version of that IP address.

A defanged IP address replaces every period "." with "[.]".

Example 1:
Input: address = "1.1.1.1"
Output: "1[.]1[.]1[.]1"

Example 2:
Input: address = "255.100.50.0"
Output: "255[.]100[.]50[.]0"

Constraints:

• The given address is a valid IPv4 address.

Solution in python:

class Solution:
    def defangIPaddr(self, address: str) -> str:
        alist = address.split('.')
        return '[.]'.join(alist)