Module It is a file containing Python definitions and statements. The file name is the module name with the suffix .py appended. Python interpreter-->Python Files(modules, identified by the .py) ⇡read ⇡sets a few special variable. ⇢ one of those variable is called __name__ ⇡if module runs in the main program : __name__ sets as __main__ ⇡if module importing from another module : __name__ sets as ..