from collections import OrderedDict
dict = OrderedDict()

for key in dict.iterkeys(): ...

>>> import collections
>>> 
>>> dct = collections.OrderedDict(zip(range(10), range(10, 20)))
>>> dct
OrderedDict([(0, 10), (1, 11), (2, 12), (3, 13), (4, 14), (5, 15), (6, 16), (7, 17), (8, 18), (9,
 19)])                                                                                          
>>> 
>>> for k in tuple(dct)[4:]:
...     k, dct[k]
... 
(4, 14)
(5, 15)
(6, 16)
(7, 17)
(8, 18)
(9, 19)
>>>