[issue34302] Avoid inefficient way to find start point in deque.index

[Raymond Hettinger]

Raymond Hettinger <raymond.hettinger at gmail.com> added the comment:

Why are we getting multiple tracker items opening and closing for this at the same time?  Something odd is happening.  Please don't close the tracker and change user ids in the middle of a conversation:

   https://bugs.python.org/issue34298
   https://bugs.python.org/issue34295

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assignee:  -> rhettinger

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue34302>
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