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'''This module implements specialized container datatypes providing
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alternatives to Python’s general purpose built-in containers, dict,
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list, set, and tuple.
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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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* ChainMap dict-like class for creating a single view of multiple mappings
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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
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* defaultdict dict subclass that calls a factory function to supply missing values
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* UserDict wrapper around dictionary objects for easier dict subclassing
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* UserList wrapper around list objects for easier list subclassing
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* UserString wrapper around string objects for easier string subclassing
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'''
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__all__ = ['deque', 'defaultdict', 'namedtuple', 'UserDict', 'UserList',
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'UserString', 'Counter', 'OrderedDict', 'ChainMap']
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