Increment 3 digit number in filename by 2

filenameIncrement.py

import os
import re
dir = os.getcwd()

for filename in os.listdir(dir):
        match = re.search("\s\d{3}\s", filename)
        if match:
                num = int(match.group().strip(" ")) + 2
                if num < 100:
                        num = "0" + str(num)
                newName = re.split("\s\d{3}\s",filename)[0] + " " + str(num)+ " " + re.split("\s\d{3}\s",filename)[1]
                os.rename(filename,newName)
                print("Renamed: "+filename+" --> "+newName)