>>> from collections import OrderedDict
>>> od = OrderedDict([('a', 1), ('b', 2)])
>>> od.move_to_end('a')
>>> od
OrderedDict([('b', 2), ('a', 1)])
>>> dict(od)
{'a': 1, 'b': 2}

This affects also PEP 468.

>>> def f(**kwargs): return kwargs
... 
>>> f(**od)
{'a': 1, 'b': 2}

And PEP 520.

>>> type('A', (), od).__dict__
mappingproxy({'a': 1, 'b': 2, '__module__': '__main__', '__dict__': <attribute '__dict__' of 'A' objects>, '__weakref__': <attribute '__weakref__' of 'A' objects>, '__doc__': None})