In fact, the documentation for eval() could be improved to explain the benefits of setting __builtins__ in the globals.
Well, if you think you're pretty clear on what's happening, a patch is always appreciated. =) I have a feeling that the docs are at least partially vague because no one actually wants to advertise the restricted execution features[1] since no one can guarantee that they're really secure...
STeVe
[1] Guido say as much http://mail.python.org/pipermail/python-dev/2002-December/031234.html
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