I think this would not work under this case: "hello worldhello lol"

You would have: "Hello worldHello Lol"

instead of: "Hello Worldhello Lol"

Here's my code:

Snew = ""
go = True
for let in S:
    if let == " ":
        go = True
    elif go:
        let = let.capitalize()
        go = False
    Snew = Snew + let
return Snew