This was the worst thing about switching to Python 3. `map` and `filter` are annoyingly "lazy" and `reduce` is basically shunned.

I wonder if the real reason this was changed was to discourage the use of `map` and `filter`... wrapping them each time with `list` is a pain in the ass and hurts readability.

And it breaks code in hard to anticipate places if you don't.

First thing I do when starting something is change them back in global scope. If I want a generator, I'll write one...

Down with PEP 8!