[issue24379] Add operator.subscript as a convenience for creating slices

[Ivan Levkivskyi]

Ivan Levkivskyi added the comment:

The patch is small and it was initially applied before 3.6b1, I think we should ask Ned (added to nosy) if this is OK to apply the fixed version?

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nosy: +ned.deily

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue24379>
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