[FIXED] Python Code Coverage Failing with import statements

Issue

I have the following project structure:

v/b.py
v/e.py
v/e_test.py
v/p.py
v/__init__.py

#v/e.py

from b import B
from p import P

class E(object):
   def run(self): pass

#v/p.py

class P(object):
   def run(self): pass

#v/b.py

from p import P

class B(object):
   def run(self): pass

#v/e_test.py

from e import E
import unittest

class ETest(unittest.Testcase):
   def testSomething(self): pass

if __name__ == '__main__':
    unittest.main()

Then I run this pip3 install coverage.

Then coverage run e_test.py

It's giving me this error

Traceback (most recent call last):
  File "e_test.py", line 4, in <module>
    from e import E
  File "~/v/e.py", line 1, in <module>
    from b import B
  File "~/v/b.py", line 1, in <module>
    from p import P
ImportError: cannot import name 'P' from 'p' (/Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/3.8/lib/python3.8/p.py)

My question now is how to fix this. Also I want to be able to run:

1. coverage run e_test.py b_test.py files_test.py
2. python3 e_test.py
3. python3 e.py

Solution

At last I found the answer. If I'm in the parent folder which contains the v folder, I can run the following command.

PYTHONPATH=./v:$PYTHONPATH coverage run -m unittest discover -s v -p "*_test.py"

or without coverage

PYTHONPATH=./v:$PYTHONPATH python3 -m unittest discover -s v -p "*_test.py"

If I'm inside the v folder, I can run

python3 e.py

and

python3 e_test.py

Answered By - TrongBang