[Python] FileNotFoundError within Python package on a file in same directory as calling...

I have created a Python package, and one of the functions I have written opens a .txt file in the same directory as that function. Locally, this works fine, but when the package is built and executed a FileNotFoundError is produced.

My package directory looks like this:

- my_app
|_ __init__.py
|_ __main__.py
|_ file.txt


In __main__.py, I have a function that looks like this to open file.txt:

from pathlib import Path

def open_file():
filepath = Path(__file__).parent / "file.txt"
with open(filepath) as f:
return f.read()


When I run it locally as python -m my_app, this works fine. However, when I build it into a package and then execute it I get the following error:

FileNotFoundError: [Errno 2] No such file or directory: '/opt/hostedtoolcache/Python/3.11.11/x64/lib/python3.11/site-packages/my_app/file.txt'

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