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Python Packages (And Modules!) Explained

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If you’ve ever opened a text file and written Python code in it, you’ve created a module! A module is a file with a .py extension that can be imported into other modules, run by itself, or both.

Packages are collections of modules that you create and use.

You may have seen if __name__ == '__main__' in a few Python modules. __name__ is usually the variable holding the name of the module itself (so if you had a module called music.py, name would hold music.) However, if you’re running the module directly through thepython command or some other means, __name__ will be __main__ instead. So when you see that if statement, it means that that block of code will only run if this module is being run directly (i.e. not imported.)

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