human
Solve in Python:
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.
assistant
#Here is the Python program you requested.

class Solution:
    def defangIPaddr(self, address: str) -> str:
        new_string =''
        for s in address:
            if s =='.':
                new_string+='[.]'
            else:
                new_string+=s
        return new_string