["python","python-3.x","dictionary","python-3.7","ordereddict"]
Will OrderedDict become redundant in Python 3.7?

From the Python 3.7 changelog: the insertion-order preservation nature of dict objects has been declared to be an official part of the Python language spec. Would this mean that OrderedDict will become redundant? The only use I can think of it will be to maintain backwards compatibility with older versions of Python which don't preserve insertion-order for normal dictionaries.
No it won't become redundant in Python 3.7 because OrderedDict is not just a dict that retains insertion order, it also offers an order dependent method, OrderedDict.move_to_end(), and supports reversed() iteration*. Moreover, equality comparisons with OrderedDict are order sensitive and this is still not the case for dict in Python 3.7, for example: >>> OrderedDict([(1,1), (2,2)]) == OrderedDict([(2,2), (1,1)]) False >>> dict([(1,1), (2,2)]) == dict([(2,2), (1,1)]) True Two relevant questions here and here. * Support for reversed() iteration of regular Python dict is added for Python 3.8, see issue33462