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Sun Nov 9 17:54:41 EST 2003 · https://mail.python.org/pipermail/python-dev/2003-November/040139.html

> From: python-dev-bounces+tdelaney=avaya.com at python.org
> 
> I guess the tests should be faster, yes, but I would still 
> want _iterables_ for ascii_*  and digits.
> 
> One issue with allowing "if char in string.letters:" is that 
> these days this will not raise if the alleged 'char' is more
> than one character -- it will give True for (e.g.) 'ab', False
> for (e.g.) 'foobar', since it tests _substrings_.

# inside string.py or equivalent ...

import sets

ascii_letters = sets.Set(ascii_letters)

Hmm - we'd have the iterability, individual characters and speed, but lose iterating in order. I'm sure there's things out there that rely on iterating over ascii_letters in order ... ;)

Tim Delaney

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[Python-Dev] other "magic strings" issues