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04:53 Lesson 20.8 The None Value Lesson 20.8 The None Value	Lesson 20.8 The None Value We have seen the None value used in several previous videos. But in this video we finally introduce it formally. In particular, we show why it is so commonly used in object initialization. attributes boss object worker attribute variable constructor class walker deal box fact initializer folder error objects variables purpose module attention From Hannah Lee 77 plays
05:40 Lesson 5.2 Procedures Lesson 5.2 Procedures	Lesson 5.2 Procedures In this video, we show you how to define a procedure in the Python interactive shell. Recall that a procedure is a function that is used as a command. function definition variable header parentheses spaces body statement assignment docstring call walker parameter thing python functions expression n. string argument From Hannah Lee 140 plays
12:43 Lesson 0.1 The Command Line Lesson 0.1 The Command Line	Lesson 0.1 The Command Line This first video introduces you to the command line, which is a text-based tool for interacting with files and programs. command folder 4s application window thing mac default ymax walker alt prompt menu parent vip purpose module slides point desktop From Walker White 717 plays