[issue17394] Add slicing support to collections.deque

[Raymond Hettinger]

Raymond Hettinger added the comment:

The slicing support can be implemented using just rotates, appends, and pops.

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assignee: rhettinger -> 
nosy: +serhiy.storchaka
priority: low -> normal
stage:  -> needs patch
type:  -> enhancement

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue17394>
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