Reference: https://docs.python.org/2/library/collections.html
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namedtuple() |
factory function for creating tuple subclasses with named fields |
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deque |
list-like container with fast appends and pops on either end |
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Counter |
dict subclass for counting hashable objects |
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OrderedDict |
dict subclass that remembers the order entries were added |
|
defaultdict |
dict subclass that calls a factory function to supply missing values |
Python library note-collection
原文：http://www.cnblogs.com/eli-ayase/p/5879643.html