docker - Running a Dockerized Python application with I/O

Question

I have a Dockerized Python script which is normally run locally as:

python script.py -f path/to/video/file

This code will produce a text file and a directory with images in the directory from which it was run.

So suppose I have this Python script on a Docker container and I use:

docker run container python script.py -f path/to/video/file

Is it possible to specify a local video file and have the output saved locally too?

Answer 1

I think that you have to utilize the -v option. Coping from here:

When given two arguments (host_path:container_path), like -v /data/mysql:/var/lib/mysql, this mounts the specified directory on the host inside the container at the specified path (and, to be accurate, this can also be used to expose host files inside the container; for example -v /etc/localtime:/etc/localtime would make /etc/localtime on the host available as /etc/localtime inside the container). This is a way of either feeding information into your container, or providing a way for your container to make files accessible to the host.