Calling python modules gives ModuleNotFoundError.

I have inherited some MATLAB code which calls some python scripts (authored by the same person, but they are no longer with the organization). I am wondering if the error I am getting is due to some missing dependencies and/or files/directories? Upon executing the script I get the following errors:

Error using <frozen importlib>_find_and_load_unlocked (line 973)

Python Error: ModuleNotFoundError: No module named 'theta_controller'

Error in <frozen importlib>_find_and_load (line 991)

Error in <frozen importlib>_gcd_import (line 1014)

I put the theta_controller.py in the same folder as the main MATLAB script doing the calling.

Are there any obvious steps I have missed so python scripts can be called by MATLAB?

I am a beginner in using MATLAB, Python, and MacOS so any help would be appreciated.

[Kojiro Saito]

How did you call theta_controller.py from MATLAB?

[James Kondash]

I believe the script calls the python module as follows:

theta = py.importlib.import_module('theta_controller');

The theta_controller.py file is in the same directory as the parent MATLAB script I am trying to run.

Maybe I'm missing some dependencies, environments, and/or path specifications?

[xing quan]

I got the same error. How to solve it? Thanks!

Answer 1

[Al Danial]

Does the MATLAB code change directories before calling the import command?

If you interactively invoke the import in a fresh MATLAB session as you've shown, with

 >> theta = py.importlib.import_module('theta_controller') 

do you also get the errors?

Will the module import correctly in Python? Open a Python session and try

import theta_controller