Python 3 - Second Edition

14    Collections

The collections module in the standard library contains advanced container data types. This term refers to data types that represent collections of objects in the broadest sense. While the generic container types list, tuple, dict and set belong to the basic data types, some more specific container types can be found in the collections module.

Function or Data Type	Description	Section
ChainMap	A concatenation of dictionaries	Section 14.1
Counter	A dictionary for recording frequencies	Section 14.2
defaultdict	A dictionary that supports a default value for not included keys	Section 14.3
deque	A doubly linked list	Section 14.4
namedtuple	A function to create named tuples	Section 14.5 ...