Sets and dictionaries are powered by hashability. And hashable objects tend to be immutable.| www.pythonmorsels.com
Python's collections.Counter class is extremely handy, especially when paired with generator expressions.| www.pythonmorsels.com
Big-O notation can be intimidating, but it doesn’t have to be. A common-sense approach will give you a good working technique for analyzing the time complexity of your code.| nedbatchelder.com
Source code: Lib/bisect.py This module provides support for maintaining a list in sorted order without having to sort the list after each insertion. For long lists of items with expensive compariso...| Python documentation
Source code: Lib/heapq.py This module provides an implementation of the heap queue algorithm, also known as the priority queue algorithm. Heaps are binary trees for which every parent node has a va...| Python documentation
Source code: Lib/collections/__init__.py This module implements specialized container datatypes providing alternatives to Python’s general purpose built-in containers, dict, list, set, and tuple.,,...| Python documentation
Unlike many programming languages, variables in Python are not buckets which "contain" objects. In Python, variables are pointers that "point" to objects.| www.pythonmorsels.com
