[issue18821] Add .lastitem attribute to takewhile instances

[Claudiu.Popa]

Claudiu.Popa added the comment:

Hello. Here's a basic patch with tests which accomplishes your request. Currently, it defaults to None if no item failed, but probably it can be set only when something fails the predicate (and the user will check using hasattr(t, 'last') ).

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keywords: +patch
nosy: +Claudiu.Popa
Added file: http://bugs.python.org/file31647/itertools_takewhile.patch

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