[issue16774] Additional recipes for itertools docs

[Raymond Hettinger]

Raymond Hettinger added the comment:

I will add drop() to the recipes and possibly take_last() which I would rename add tail().

Sorry, I don't have interest in the others.  I don't find them instructive or very useful.

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priority: normal -> low

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<http://bugs.python.org/issue16774>
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