Python app does not print anything when running detached in docker

Question

I have a Python (2.7) app which is started in my dockerfile:

CMD [\"python\",\"main.py\"]

main.py prints some strings when it is s

Answer 1

In my case, running Python with -u didn't change anything. What did the trick, however, was to set PYTHONUNBUFFERED=0 as environment variable:

docker run --name=myapp -e PYTHONUNBUFFERED=0 -d myappimage