CODEWITHSUNDEEP
pythonmodulepackage
user3164083
user3164083

Reputation: 1073

How to set up Python packages

I want this structure:

Zimp/controller/game_play -->How do I: import Zimp/model/game_play module in the easiest way? Zimp/model/game_play

I made a folder called controller and a folder called model. Within those folders I put an empty __init__.py file (don't know why that would do anything). I didn't make a model.py file or a controller.py file. It didn't work. I just made a model.py and a controller.py that are empty except for the main block that automatically appears when creating a new module. No difference.

In controller/game_play.py I tried: from ..model import game_play_model

It says value error: attempted relative import in non-package

Is the idea not to actually put them in separate directories? What is the norm?

Thanks

Upvotes: 1

Views: 686

Answers (2)

martineau
martineau

Reputation: 123463

The problem is you're trying to execute a subpackage module directly, see answers to the question Attempted relative import in non-package even with __init__.py.

First I think you need to set up your directory file structure like this:

Zimp/                       top-level package
    __init__.py                 package initalization
    controller/                     subpackage
        __init__.py                     subpackage initalization
        game_play.py                    subpackage module
    model/                          subpackage
        __init__.py                     subpackage initalization
        game_play_model.py              subpackage module

The __init__.py files can all be empty as they just indicate that the directory is a [sub]package.
For illustrative purposes let's say thegame_play_model.pyfile contained:

print 'hello from game_play_model.py'

and thegame_play.pyfile contains the following to detect when it was being executed directly and adds the name of the parent of its folder — Zimp — to the Python search path — thus allowing you to then directly import other things from the package when it's run that way.

if __name__ == '__main__' and __package__ is None:
    import sys, os.path as path
    # append parent of the directory the current file is in
    sys.path.append(path.dirname(path.dirname(__file__)))

import model.game_play_model

print 'hello from game_play.py'

And you executed it directly with something likepython game_play.pyit would output:

hello from game_play_model.py
hello from game_play.py

Upvotes: 1

Ruben
Ruben

Reputation: 1437

from Zimp.model import game_play

Should do the trick.

Upvotes: 0

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