Yes, you have to think a bit more when reformatting Python, but it is worth it as you never get the missing brace problem that you can get when moving Perl blocks around. Its enough of a benefit for me.
The point is: I don't have to think at all. Reformatting code with Perl is a matter of a save hook in the editor or a pre-commit hook in your VCS. No thinking necessary, it just works.
