Martin Panter added the comment:
Another option might be to do away with the regular expression (personally I
like to avoid REs and code generation where practical):
def _is_legal_key(key):
return key and set(_LegalChars).issuperset(key)
----------
nosy: +martin.panter
stage: needs patch -> patch review
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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue26302>
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