collections — High-performance container datatypes

This module implements the following specialized container datatypes:

Objects

• namedtuple: factory function for creating tuple subclasses with named fields
• 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

For more information and how to use those objects, check Python Collections Module documentation.

Example

import collections

c = collections.Counter('gallahad')
print c["a"]
# 3
print c.most_common(1)
# [('a', 3)]

Point = collections.namedtuple('Point', ['x', 'y'])
p = Point(1,2)
print p.x
# 1
print p.y
# 2