Hi Rhodri,
It's only really a pitfall if you try to use the built-in after you've redefined it. That's the thing to keep an eye open for.
You're right, but in cases where you're editing a codebase which you didn't author entirely by yourself you may not be aware of that.
That said, if the codebase you're working on is structured (short, concise methods) you should be working with small, consumable scopes you can inhale in entirety before modifying.
Regards, Friðrik Már -- http://mail.python.org/mailman/listinfo/python-list
