Docker ENV for Python variables

Within your python code you can read env variables like:

import osusername = os.environ['MY_USER']password = os.environ['MY_PASS']print("Running with user: %s" % username)

Then when you run your container you can set these variables:

docker run -e MY_USER=test -e MY_PASS=12345 ... <image-name> ...

This will set the env variable within the container and these will be later read by the python script (test.py)

More info on os.environ and docker env

In your Python code you can do something like this:

 # USERNAME = os.getenv('NAME_OF_ENV_VARIABLE','default_value_if_no_env_var_is_set') USERNAME = os.getenv('USERNAME', 'test')

Then you can create a docker-compose.yml file to run your dockerfile with:

version: '2'services:  python-container:    image: python-image:latest    environment:      - USERNAME=test      - PASSWORD=12345

You will run the compose file with:

$ docker-compose up

All you need to remember is to build your dockerfile that you mentioned in your question with:

$ docker build -t python-image .

Let me know if that helps. I hope that answers your question.