python3: can't open file - How to access directories with Docker

Question

I have tried multiple options but I just can't figure out how to access my starting foo.py file which is hiden in my directory structure.

The structure looks like this:

D:
│___ Dockerfile
│
└───Level1
    └───Level2
            foo.py

Now to start the project I need to access the foo.py file, which then works with different files spread over Level1 and 2. The problem is that I am not able to access the foo.py file with something like:

COPY /Level1 .    
CMD ["python3", "/Level1/Level2/foo.py"]

The error is python3: can't open file

Please help

you need to copy the file to your contaoner using Dokcerfile or using volumes — LinPy
– LinPy, Commented Oct 26, 2019 at 17:30
What have you already done to try to debug the issue? For instance, have you looked at the filesystem layout using a debugging shell? — David Maze
– David Maze, Commented Oct 26, 2019 at 19:43

dustytrash · Accepted Answer · 2019-10-26 17:23:22Z

2

Your path is wrong. Change your CMD from CMD ["python3", "/Level1/Level2/foo.py"] to CMD ["python3", "/Level2/foo.py"]

You are copying from Level1/ to ., so you lose that Level1 folder.

As a side note, please include the entire error message in the post. the error message can't open file is very confusing, however the error message python3: can't open file '/Level1/Level2/foo.py': [Errno 2] No such file or directory is very clear.

answered Oct 26, 2019 at 17:23

dustytrash

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