The point of object-oriented programming is to solve a problem via the interactions of objects. When we write 6*7, the multiplication of the two objects is handled by a method of the built-in int class. For more complex behaviors, we'll often need to write unique, new classes. Here are the first two core rules of how Python objects work:. Everything in Python is an object Object Orientated Programming (II) Inheritance "a dog (subclass) is a mammal (parent / superclass)" Subclass is derived from / inherits / extends a parent class. Override parts with specialized behavior and extend it with additional functionality. Liskov substitution principle: What works for the parent class should also work for any subclass. 8 Copyright Atomic Object, LLC © 2009 2. THE OBJECT ORIENTED PARADIGM 2.1 METAPHORS • Hard boiled eggs • Little black boxes • Widget factories Python deletes unneeded objects (built-in types or class instances) automatically to free memory space. The process by which Python periodically reclaims blocks of memory that no longer are in use is termed garbage collection. Python's garbage collector runs during program execution and is triggered when an object's reference count reaches zero. Object Oriented Programming in Python. This note explains the following topics: Essentials of a Python program, Variables and scope, Selection control statement, Collections, Errors and exceptions, Functions, Classes, Object-oriented programming, Packaging and testing, Useful modules in the Standard Library, GUI programming with tkinter, Sorting, searching and algorithm analysis. Purdue University • As a OOP language, Python has its special advantages but also has its disadvantages. • Python can support operator overloading and multiple inheritance etc. advanced definition that some OOP languages don't have. • The advantages for Python to use design pattern is that it supports dynamic type binding. In other words, an object is Note: This tutorial is adapted from the chapter "Object-Oriented Programming (OOP)" in Python Basics: A Practical Introduction to Python 3. The book uses Python's built-in IDLE editor to create and edit Python files and interact with the Python shell, so you will see occasional references to IDLE throughout this tutorial. However, you Nov 9, 2018 Python3_Prog_OOP.odp c 2018 5 After the keyword class, you type the name of the class to be created. Notice by convention, the first letter of a Object Oriented Programming in Python 12 Marks Introduction: • Python follows object oriented programming paradigm. It deals with declaring python classes and objects which lays the foundation of OOP's concepts. • Python programming offers OOP style programming and provides an easy way to develop programs. Python Object-Oriented Programming, Fourth Edition dives deep into the various aspects of OOP, Python as an OOP language, common and advanced design patterns, and hands-on data manipulation and testing of more complex OOP systems. These concepts are consolidated by open-ended exercises, as well as a real-world case study at the end of every An Introduction to OOP Using Python: Part I Basic Principles and Syntax 7.1 What is object-oriented programming Object-oriented programming (OOP), deservedly or not, has something of a reputation as an obtuse and mysterious way of programming. You may have heard of it, and even heard that it is a powerful way of writing programs, but Python Object-Oriented Programming, Fourth Edition dives deep into the v