Unable to run nbqa on notebooks present in directory without __init__.py

OS: Ubuntu 18.04 nbqa version: 0.1.21

I have a notebook present in a directory which is not a python package. When i try to run the following command nbqa black <my_notebook_file>, I get a StopIteration exception traceback. I looked into the code and I was able to figure out why it is raising this exception.

def _create_blank_init_files(notebook: Path, tmpdirname: str) -> None:
    parts = notebook.resolve().relative_to(Path.cwd()).parts

    for idx in range(1, len(parts)):
        # next on directory with no __init__.py raises StopIteration exception
        init_file = next(Path(os.path.join(*parts[:idx])).glob("__init__.py"))
        if init_file is not None:
            Path(tmpdirname).joinpath(init_file).parent.mkdir(
                parents=True, exist_ok=True
            )
            Path(tmpdirname).joinpath(init_file).touch()

I fixed the code locally and ran isort, black, flake8 and mypy. This is the fix I made locally

import contextlib

def _create_blank_init_files(notebook: Path, tmpdirname: str) -> None:
    parts = notebook.resolve().relative_to(Path.cwd()).parts

    for idx in range(1, len(parts)):
        with contextlib.suppress(StopIteration):
            init_file = next(Path(os.path.join(*parts[:idx])).glob("__init__.py"))
            if init_file is not None:
                Path(tmpdirname).joinpath(init_file).parent.mkdir(parents=True, exist_ok=True)
                Path(tmpdirname).joinpath(init_file).touch()

Are you mandating the presence of __init__.py file in the directory of notebooks to run nbqa?

[girip11]

Hey @MarcoGorelli, I am interested in contributing to this library. I use VSCode as IDE. I was going through nbqa library dev ecosystem, setting up its dependencies in VSCode. I have made some minor changes during this process. I have my local setup ready now, I will soon be sending out smaller PRs as mentioned.

[girip11]

Thanks @MarcoGorelli . I updated to latest release (0.1.22) and I didn’t face this issue.