python - What is the purpose of the __init__.py? -


this question has answer here:

when creating python package, told create blank file called init.py. don't understand why need create file. distutils build script doesn't modify it, 5 builds later it's still blank. it's purpose?

it signal python folder package, not folder. contains initialization code run when package imported script.

see the docs on subject more. relevant extract:

the __init__.py files required make python treat directories containing packages; done prevent directories common name, such string, unintentionally hiding valid modules occur later on module search path. in simplest case, __init__.py can empty file, can execute initialization code package or set __all__ variable, described later.


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