uh, no. whitespace block indentation means blocks have no delimiters. using "END IF" etc means you're adding a closing delimiter. python says: you don't need it.
really, though, this stuff is minor. any good editor will handle all this for you, whether with braces or without. the other language i like is LISP, which is diametrically opposite python in its use of ()s everywhere.
I have a theory that it's impossible to prove anything, but I can't prove it.