Boolean idioms (was Re: re Challenge: More Compact?)

Aahz Maruch aahz at
Mon Jul 16 09:33:00 EDT 2001

In article <mailman.995247446.16415.python-list at>,
Tim Peters < at> wrote:
>Well, it's un-Pythonic to try to emulate Perl undef via Python None; it's
>idiomatic to return 0 for false and 1 for true, [...]

I know that it's a frequent Python idiom to use 0/1, but where is it
specifically un-Pythonic to use None/1?
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