Why is the python module getting imported without its functions?

Question

I have created a setup.py script for a gui application and a runner script myapp. The runner script contains:

#!/usr/bin/env python3

import myapp
myapp.gui_mode()

The application can be run from command line with python3 myapp.py Here is how myapp.py looks like:

#!/usr/bin/evn python3

def gui_mode():
    run_app()

def main():
    print("Starting UI")
    gui_mode()

if __name__ == '__main__':
    main()

After I install the app with sudo python3 setup.py install and attemp to run it from console with myapp, I receive the following message: AttributeError: module 'myapp' has no attribute 'gui_mode'

Ok, I start python3 interpreter and check:

import myapp
print(dir(myapp))
['__builtins__', '__cached__', '__doc__', '__file__', '__loader__', '__name__', '__package__', '__path__', '__spec__']

I wonder, why is myapp getting imported without its own functions?

UPDATE

In [4]: print(myapp.__file__)
/home/tastyminerals/dev/NEFI2/nefi2/__init__.py

Here is the project structure:

APP2/
    setup.py
        myapp/myapp.py
        myapp/bin/run_myapp  <-- renamed runner file
        myapp/__init__.py
        myapp/data

Critical part of setup.py:

    packages=['myapp'],

    scripts=[
        'myapp/bin/run_myapp'
    ],

Dan D. · Accepted Answer · 2016-03-19 01:59:07Z

1

If you import the myapp.py you've shown here, it will have gui_mode and main attributes. I suspect that you're not loading the myapp.py module that you're trying to load. Check the value of myapp.__file__ to see which file you actually loaded.

edited Mar 19, 2016 at 1:59

Dan D.

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answered Mar 19, 2016 at 1:55

molecule

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1 Comment

tastyminerals Over a year ago

It is loaded as __init__.py which is empty.

ShadowRanger · Accepted Answer · 2016-03-19 01:49:55Z

1

The runner script is named myapp and the module it depends on is also named myapp. Did you perchance name the package myapp as well? Something installed with setup.py has a base package name, so I'm guessing you probably named the package myapp too, so you'd actually need to import myapp.myapp (or rename myapp.py in the package to __init__.py so the package acts like a module of the same name).

It's a bad idea to overlap names like this in any event; if the runner script itself is named myapp.py, then it will import itself in preference to the installed myapp package; Python searches the local directory first, which is why it's a bad idea to name your scripts names that overlap Python built-in modules (e.g. never name a script math.py or you may screw up import math statements for other scripts in the same directory).

answered Mar 19, 2016 at 1:49

ShadowRanger

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1 Comment

tastyminerals Over a year ago

I've renamed the runner script, unfortunately to no effect.

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