Eric Snow added the comment: The view objects aren't sequences. od.items() and od.keys() implement Set. od.values() doesn't even do that much, only implementing __len__(), __iter__(), and __contains__().
The glossary implies that you should use "reversed(list(view))". [1] More information on mapping views is located in the docs for collections.ABC and for dict. [2][3] The source for the Mapping views is also helpful. [4] Keep in mind that OrderedDict is not a sequence-like dict. It is essentially just a dict with a well-defined iteration order (by insertion order). [5] Just like its views, it should not used as a sequence. [1] http://docs.python.org/3/glossary.html#term-view [2] http://docs.python.org/3/library/stdtypes.html#dict-views [3] http://docs.python.org/3/library/collections.abc.html#collections.abc.MappingView [4] http://hg.python.org/cpython/file/3.3/Lib/collections/abc.py#l435 [5] http://docs.python.org/3.3/library/collections.html#collections.OrderedDict ---------- nosy: +eric.snow _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue19505> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
