Agfdhyk

I am trying to run a google ortools example in PyCharm and got the following errors:

/Users/edamame/project/ortools/simple_program.py

Traceback (most recent call last):

  File "/Users/edamame/project/ortools/simple_program.py", line 3, in <module>

    from ortools.linear_solver import pywraplp

ModuleNotFoundError: No module named 'ortools.linear_solver'



Process finished with exit code 1

However, if I run the same code outside the PyCharm (under the corresponding project venv), it works fine:

(venv) edamame$ pwd

/Users/edamame/project/ortools/

(venv) edamame$ python simple_program.py 

Solution:

Objective value =  4.0

x =  1.0

y =  1.0

I then tried to print below in both cases:

import sys

print('n'.join(sys.path))

The outputs:

In PyCharm:

/Users/edamame/project/venv/bin/python

/Users/edamame/project/ortools/so_example.py

/Users/edamame/project/ortools

/Users/edamame/project

/Library/Frameworks/Python.framework/Versions/3.6/lib/python36.zip

/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6

/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/lib-dynload

/Users/edamame/project/venv/lib/python3.6/site-packages

/Users/edamame/project/venv/lib/python3.6/site-packages/setuptools-39.1.0-py3.6.egg

/Users/edamame/project/venv/lib/python3.6/site-packages/pip-10.0.1-py3.6.egg

Outside PyCharm:

(venv) edamame$ python so_example.py 

/Users/edamame/project/ortools

/Library/Frameworks/Python.framework/Versions/3.6/lib/python36.zip

/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6

/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/lib-dynload

/Users/edamame/project/venv/lib/python3.6/site-packages

/Users/edamame/project/venv/lib/python3.6/site-packages/setuptools-39.1.0-py3.6.egg

/Users/edamame/project/venv/lib/python3.6/site-packages/pip-10.0.1-py3.6.egg

They seem to be the same though ... not sure what could be the problem ...

How do I make the same code working in PyCharm?

You have a namespace collision between custom ortools package and the installed one. PyCharm adds the project root (/Users/edamame/project) to PYTHONPATH by default and it causes the problem.

Either rename your custom ortools package or disable Add content roots to PYTHONPATH option in the dedicated Run Configuration in PYCharm.

The env var PYTHONPATH is relevant. In both situations, print the value of sys.path:

import sys

print('n'.join(sys.path))

In bash, you may find it helpful to enter the venv and then $ open /Applications/PyCharm.app (or whatever it's called on your Mac). Then the running pycharm will inherit PYTHONPATH from bash.

Here is another approach. Within pycharm type CMD-, (command comma) for preferences, search for Project Structure, right click on the edamame/project folder, and choose alt-S Sources. This will add the folder to your path within pycharm. Again, use print() to verify sys.path contains what you expect it to contain.