docker python custom module not found

Question

I am new to docker and trying to move one simple application to docker. Python standard modules I am able to import using "pip install". However, I have some custom python utility files that I would like to use. These files are in separate package "utils".

In my main python file : test.py, I am doing

from utils import math.py, logger.py

This outside of docker works fine, but when running through docker gives me the error "ImportError: No module named utils".

My Dockerfile code:

FROM python:2.7.11
ADD ./ test_project/
WORKDIR test_project
ENV PATH=$PATH:/test_project/utils
ENV PYTHONPATH /test_project/utils

CMD [ "python", "report/test.py"]

---

My directory structure:

• test_project
  • report
  • utils

Any suggestions?

Answer 1

You set PYTHONPATH to /test_project/utils. When trying resolve the module utils, it is looking for one of:

• file /test_project/utils/utils.py
• directory /test_project/utils/utils/ that contains __init__.py.

It looks like you have this?

utils/math.py
utils/logger.py

I wonder if what you really mean to do is

# different path...
ENV PYTHONPATH /test_project

from utils import math
from utils import logger