Simple code that obfuscates a string

obfuscator.py

from random import randint
s = "Hello World!"
ob = "000000!%*£?#*" #Obfucation chars
new_s = ""
for c in s:
    cc = ob[randint(1,len(ob) - 1)]
    if (cc == "0" or c == " " or c == "."):
        new_s += c
    else:
        new_s += cc

print(new_s) #Outputs obfuscated result