Python Permutations with itertools: Examples and Counts
Generate ordered Python permutations with itertools, understand factorial output growth, handle duplicate values, and choose combinations when order does not matter.
Tutorials
Browse Python tutorials for beginners and working developers, including syntax, libraries, examples, projects, and real problem-solving guides.
How to Combine Lists in Python: +, extend(), and Unpacking
Combine Python lists with new-list or in-place methods, and avoid the nested-list behavior of append().
Python Uppercase: upper(), isupper(), and Unicode Strings
Convert strings with upper(), test case with isupper(), compare safely with casefold(), and handle Unicode case behavior.
Python super(): Cooperative Inheritance and Method Calls
Learn Python super() for cooperative inheritance, method resolution order, multiple inheritance, constructors, and reliable class design.
Python not in: Membership Tests, not, and is not
Use Python not in for absence, not for Boolean negation, and is not for identity checks across common containers.
How to Exit Python: sys.exit(), Status Codes, and Cleanup
Stop a Python program cleanly with sys.exit() or a returned main status, while keeping cleanup and failure codes predictable.
Python bisect: Search and Insert in Sorted Lists
Use Python’s bisect module to find insertion points, keep lists sorted, handle duplicates, and choose between bisect and a sorted collection.
Python max(): Largest Values, key, and default
Use Python max() for numbers and records, define comparison with key, handle empty iterables with default, and avoid mixed-type errors.
Tic-Tac-Toe in Python: Board State, Rules, and Win Checks
Build Tic-Tac-Toe in Python with a validated board, turn handling, win detection, draws, input boundaries, and testable game state.
Python Hashmaps: Dictionaries, Hashing, and O(1) Lookup
Understand Python hashmaps through dictionaries, hashing, key-value storage, lookup behavior, updates, and collision-aware design.