Importing modules

Syntax

• import module_name
• import module_name.submodule_name
• from module_name import *
• from module_name import submodule_name [, class_name, function_name, …etc]
• from module_name import some_name as new_name
• from module_name.submodule_name import class_name [, function_name, …etc]

Remarks

Importing a module will make Python evaluate all top-level code in this module so it learns all the functions, classes, and variables that the module contains. When you want a module of yours to be imported somewhere else, be careful with your top-level code, and encapsulate it into if __name__ == '__main__': if you don’t want it to be executed when the module gets imported.