Write files outside of a docker container via python

Question

Is there a way to write files (json in this case) to outside of the docker container? I'm taking about the most simple way, for example:

data = {"id":"1","name":"sample"}
with open('name.json','w') as fp:
   json.dump(data,fp,indent=4)

is there a way to make this write outside of the docker container? or in a specific place? or to save it on a specific path on the system that the container will run on?

Answer 1

Let's assume

• your python script has the location /app/myscript.py in your docker container.
• the location for where your python script should write the files is /home/jon/result_files/
• your docker image is called mypyimg

Then you can use volumes to mount a host location when starting your container:

docker run -d \
  --name my_py_container \
  -v /home/jon/result_files:/app \
  mypyimg