import with no known parent package

I found similar discussion here. But my problem is it works running python code in normal mode. When I run in debugging as python -m pdb nmt.py, I have ImportError: attempted relative import with no known parent package. My python version is Python 3.7.13. Error is coming from the following line.

from . import inference

How to make it work in debugging?

Answer

Explanations

The error message is actually pretty explicit:

Relatives import (using from . import module, or from .module import something) Only work if the module (ie the file) you are editing, and the module you are importing are in the same python package.

That means you need a __init__.py file in that directory (for it to be considered a package).

I recommend you read the documentation on modules if you want to understand the import system better

Quick fixes

• either add a __init__.py to make your directory into a package
• or change your relative import to a normal import (ie. change from . import inference to import inference.) — you may need to add the directory containing your files to sys.path (documentation)