Few chapter wise pickings from Dive into Python by Mark Pilgrim.
Objects in Python
- Everything in Python is an object. Strings are objects. Lists are objects. Functions are objects. Even modules are objects. Almost everything has attributes and methods. All functions have a built-in attribute __doc__, which returns the doc string defined in the function’s source code.
- Different programming languages define “object” in different ways. In some, it means that all objects must have attributes and methods; in others, it means that all objects are subclassable. In Python, the definition is looser; some objects have neither attributes nor methods, and not all objects are subclassable. But everything is an object in the sense that it can be assigned to a variable or passed as an argument to a function.
