pythonic way to rewrite an assignment in an if statement

Question

Is there a pythonic preferred way to do this that I would do in C++:

for s in str:
    if r = regex.match(s):
        print r.groups()

I r

Answer 1

This might be an overly simplistic answer, but would you consider this:

for s in str:
    if regex.match(s):
        print regex.match(s).groups()