README.md

hotmodern-python

My Python learning project by article series 'Hypermodern Python' (by Claudio Jolowicz)

This repo 98% repeats code from these articles with little improvements for Windows environment and except several components (pre-commit, pytype, typeguard, Release Drafter)

Notes for Windows host

Functions with temp file on Windows

Windows has security limitation for temp files: OS does not allow processes other than the one used to create the NamedTemporaryFile to access the file (from here)

That's why I modified code like this:

# noxfile.py
import pathlib

def install_with_constraints(session: Session, *args: str, **kwargs: Any) -> None:
    """Install packages constrained by Poetry's lock file."""
    with tempfile.NamedTemporaryFile(delete=False) as requirements:
        session.run(
            "poetry",
            "export",
            ...
        )
        session.install(f"--constraint={requirements.name}", *args, **kwargs)
    pathlib.Path(requirements.name).unlink()

Run Nox sessions with pyenv's Python versions

Option A

Use Nox CLI argument --extra-pythons and full paths to desired version of Python interpreter

Example:

nox --extra-pythons "C:\users\winfan\.pyenv\pyenv-win\versions\3.8.2\python.exe" "C:\users\winfan\.pyenv\pyenv-win\versions\3.9.2\python.exe"

will run all sessions with Python specified in noxfile.py (or skip if not found) and with all Pythons passed in this command. See detailed explanation how --extra-pythons and --extra-python works from Claudio Jolowicz himself

Option B

Create separate noxfile for local execution. Duplicate all sessions and change python versions like this:

# noxfile.local.py

@nox.session(
    python=[
        r"C:\users\winfan\.pyenv\pyenv-win\versions\3.8.2\python.exe",
        r"C:\users\winfan\.pyenv\pyenv-win\versions\3.9.2\python.exe",
    ],
    reuse_venv=True,
)

Then run command in your Terminal nox -f noxfile.local.py
Don't forget to add this file to .gitignore