The aim of this appendix is twofold: to provide a quick refresher on some Python topics that weren’t thoroughly introduced in the chapters and to introduce topics that will help you write better Python programs.
Throughout the book, we’ve used the following block of code, where func() is a function we’ve defined in the program:
if __name__ == '__main__': # Do something func()
This block of code ensures that the statements within the block are executed only when the program is run on its own.
When a program runs, the special variable __name__ is set to __main__ automatically, so the if ...