python absolute import and pycharm

Question

When I use relative imports, my code runs correctly but pycharm moans. In sum.py, the import line is underlined in red and I have no completion.

If I try to switch to use absolute imports by adding "app." everywhere, pycharm is happy but the code doesn't run anymore. I get: "ModuleNotFoundError: No module named 'app'"

Here is the tree structure of my project. It's the content of my test_import folder:

.
-- app
    | -- main.py
    | -- mul.py
    | -- folder
         |-- sum.py

main.py:

from folder.sum import sum, mul_import
from mul import mul

if __name__ == '__main__':
    a=1
    b=2
    print("sum ", sum(a, b))
    print("mul ", mul(a, b))
    print("mul import ", mul_import(a, b))

mul.py:

def mul(a, b):
    return a * b

sum.py:

from mul import mul

def sum(a, b):
    return a + b

def mul_import(a, b):
    return mul(a, b)

Is it possible to use "app." everywhere to have the completion but make the code work?

Answer 1

In pycharm I have to run with the green arrow and not in command line with "python main.py" or "python app/main.py". This works because the project directory is added to the pythonpath (in the configuration of the run).

For docker I had to add the project directory to the pythonpath.