Python package I created not importing correctly in Docker container

Question

I created a package out of a project and I want to run that package in a Docker container. The package is a Flask application and after installing the package locally I can run the project with FLASK_APP=packagename and flask run . When I do the same in the Docker container I get the error Error: Could not import "packagename.packagename". This is my Dockerfile:

FROM python:3.7
FROM pytorch/pytorch

MAINTAINER Nikolay Valkov nikolay1499@gmail.com

# set a directory for the app
WORKDIR /usr/app/

# copy all the files to the container
COPY . .

# install dependencies
RUN pip install --no-cache-dir -r requirements.txt

WORKDIR /usr/app/src/

RUN pip install -e .

WORKDIR /usr/app/src/packagename

# tell the port number the container should expose
EXPOSE 5000

ENV FLASK_APP packagename

# run the command
CMD flask run

Any ideas why this occurs only in the Docker container and not locally.

Answer 1

You can try do it like this, it should copy the package to your working directory: changes replace WORKDIR with ADD OR COPY CMD

FROM python:3.7
FROM pytorch/pytorch

MAINTAINER Nikolay Valkov nikolay1499@gmail.com

# set a directory for the app
WORKDIR /usr/app/

# copy all the files to the container
COPY . .

# install dependencies
RUN pip install --no-cache-dir -r requirements.txt

WORKDIR /usr/app/src/

RUN pip install -e .

ADD /usr/app/src/packagename packagename

# tell the port number the container should expose
EXPOSE 5000

ENV FLASK_APP packagename

# run the command
CMD flask run