Dynamically importing Python modules

I am trying to import the members of a module whose name is not known. Instead of

import foo

I am using:

__import__("foo")

How can I achieve a similar thing for the from foo import bar case instead of resorting to an "eval"?

Update: It seems fromlist did the trick. Is there a way to emulate from foo import *? fromlist=['*'] didn't do the trick.