Python Docker ModuleNotFoundError：没有名为“config”的模块

Question

I am new to the docker world, and i need to create an docker image for the front-end programmers in my team.

this is how my dockerfile looks like

FROM python:3.8

WORKDIR /backend

COPY requirements.txt ./
RUN pip install --no-cache-dir -r requirements.txt

COPY config.py ./

COPY ./api ./api

CMD [ "python", "./api/service/server.py" ]

And this is how the structure looks like, structure

When I try to run my docker image, the terminal gives me the error

Traceback (most recent call last):
  File "./api/service/server.py", line 1, in <module>
    import config
ModuleNotFoundError: No module named 'config'

And in server.py I wrote import config

Answer 1

Purely going by the images (as it's not reproducible) I'd say you copy requirements.txt twice in your file, but you don't copy config.py at all. Since according to your structure it's not under .api it won't be copied at all and therefor most likely is missing, hence the error.

Answer 2

I have solved my problem, it seems like i needed to use an ENV in my dockerfile

ENV PYTHONPATH "${PYTHONPATH}:/backend"
ENV PYTHONUNBUFFERED 1