Python 3 Deep Dive Part 4 Oop High Quality Repack

By default, == checks for value equality (calling __eq__ ), while is checks for identity (memory address via id() ).

Python favors duck typing (“if it quacks like a duck…”), but sometimes you need formal interfaces. python 3 deep dive part 4 oop high quality

Every Python instance carries a hidden __dict__ (a hash table for attributes). This is flexible but memory-inefficient for millions of objects. By default, == checks for value equality (calling