absolute imports abstract base classes (abcs@classmethod about creating - using abstract factory pattern - abstraction about defining examples abstract methods access control adapter pattern about - adapter class interface interface aggregation about comparingwith composition assertion methods asyncio about asyncio futurereading executors executorsusing to wrap blocking code for networking - implementing streams attributes specifying basic inheritance about - built-insextending overriding super function behaviors about defining specifying bottom-up design built-ins extending - camelcase notation case studyobject-oriented design - character classes class code coverage code coverage test verifying - command pattern - composite pattern - composition - comprehensions dictionary comprehension generator expressions list comprehensions - concurrency about case study - constructor context manager -