Hands-On Data Structures and Algorithms with Python - Second Edition

Collections

The collections module provides more specialized, high-performance alternatives for the built-in data types as well as a utility function to create named tuples. The following table lists the datatypes and operations of the collections module and their descriptions:

Datatype or operation	Description
namedtuple()	Creates tuple subclasses with named fields.
deque	Lists with fast appends and pops either end.
ChainMap	Dictionary-like class to create a single view of multiple mappings.
Counter	Dictionary subclass for counting hashable objects.
OrderedDict	Dictionary subclass that remembers the entry order.
defaultdict	Dictionary subclass that calls a function to supply missing values.