[issue21667] Clarify status of O(1) indexing semantics of str objects

[Nick Coghlan]

Nick Coghlan added the comment:

Guido, I think we need your call on whether or not to add a note about string indexing algorithmic complexity to the language reference, and to approve the exact wording of such a note (my proposed wording is in my initial comment on this issue).

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nosy: +gvanrossum

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue21667>
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