Python collections

https://docs.python.org/3/library/collections.html

This module implements specialized container datatypes providing alternatives to Python’s general purpose built-in containers, dict, list, set, and tuple.

• namedtuple() factory function for creating tuple subclasses with named fields

• deque list-like container with fast appends and pops on either end

• ChainMap dict-like class for creating a single view of multiple mappings

• Counter dict subclass for counting hashable objects

• OrderedDict dict subclass that remembers the order entries were added

• defaultdict dict subclass that calls a factory function to supply missing values

• UserDict wrapper around dictionary objects for easier dict subclassing

• UserList wrapper around list objects for easier list subclassing

• UserString wrapper around string objects for easier string subclassing

Related

• Python collection: deque (double-ended queue)

See also

• Python collections
• Data structures: queue, list, linked list, stack, trie, Abstract data structures, Python collections, Hash table
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