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In Python 3.4.1 installed with Anaconda. I tried the following
(expecting an OrderedDict as result):
>>>from collections import namedtuple
>>>NT = namedtuple("NT",["a","b"])
>>>nt = NT(1,2)
>>>print(vars(nt))
{}
so the result is an empty dict. In Python 3.3.2 (downgraded in the
same Anaconda environment) results in:
>>>print(vars(nt))
OrderedDict([('a', 1), ('b', 2)])