table of contents about the tutorial audience prerequisites copyright disclaimer table of contents ii python design patterns introduction structure of design pattern why python python design patterns gist of python features of python language important points how to download python language in your system the important tools in python what constitutes design pattern in python python design patterns model view controller pattern python design patterns singleton pattern how to implement singleton class python design patterns factory pattern how to implement factory pattern python design patterns builder pattern how to implement builder pattern python design patterns prototype pattern how to implement prototype pattern python design patterns facade pattern how to design facade pattern python design patterns command pattern ii