Python3 in DockerFile running ubuntu::latest
docker, python
Solution
You can first check where Python is getting installed with `which python3` and then put that path into your `CMD` command.
Problem
I am trying to upgrade from running my script in Python 2.7 to Python 3.5. It is a simple Flask admin script running inside a docker container. DockerFile: ``` FROM ubuntu:latest RUN apt-get update -y && apt-get install -y python-pip python3.5-dev build-essential libpq-dev .... CMD ["/usr/bin/python", "app.py"] ``` This runs it in python 2.7. I tried updating to ``` CMD ["/usr/bin/python3", "parcelnotifer.py"] ``` but this results in an error Cannot start service dev: oci runtime error: exec: "/usr/bin/python3": stat /usr/bin/python3: no such file or directory If I docker exec into the container when it is running on 2.7 I can use the command python3 so Python3 is definitely installed I am just not sure how to force the script to run in Python3