DOCKER Python Path-CodePudding

I am new to Docker. 1 Thing is confusing me, when I print the output of which python in Docker, it points towards the system's python, even though I have mentioned the python3.7 as a base image, so it should be pointing towards image python right?

My docker file is as follows:

FROM python:3.7

RUN which python3
RUN which python3.7
RUN which python

The output is

Sending build context to Docker daemon  2.048kB
Step 1/4 : FROM python:3.7
 ---> 7c891de3e220
Step 2/4 : RUN which python3
 ---> Running in bfcab000b493
/usr/local/bin/python3
Removing intermediate container bfcab000b493
 ---> be30731a0a5a
Step 3/4 : RUN which python3.7
 ---> Running in 144cf28963eb
/usr/local/bin/python3.7
Removing intermediate container 144cf28963eb
 ---> 7434c6aa69cb
Step 4/4 : RUN which python
 ---> Running in 88e3133f4e41
/usr/local/bin/python
Removing intermediate container 88e3133f4e41
 ---> 872bfb66fc7d
Successfully built 872bfb66fc7d
Successfully tagged docker_testing:latest

You can see that it is responding all the python to /usr/bin/pythonx

I want to ask if this is the Docker's Python that is being used or not, or is it using my system's Python.

Thanks.

CodePudding user response：

When you run RUN which python3 that is path in your docker image not your system path, you can try RUN touch /usr/bin/testtesttest and check in your system.

Data in docker container can storage in your system only when you mount

CodePudding user response：

No the Docker is fetching python image from the docker image link It will not use your system python

You can see that it is responding all the python to /usr/bin/pythonx this is because the docker is creating a separate system for the docker image. and this path is from that system.