GitHub Action to spellcheck and lint Python code

[cclauss]

This Action uses minimal steps to run in ~5 seconds to rapidly:

• use codespell to look for typos in the codebase, and
• use ruff to lint Python code and provide intuitive GitHub Annotations to contributors.

Tools:

• https://github.com/codespell-project/codespell#readme
• https://docs.astral.sh/ruff

---

The wildcard import from ctypes import * is not a good idea because it can hide undefined name errors:

• https://peps.python.org/pep-0008/#imports
• https://docs.astral.sh/ruff/rules/undefined-local-with-import-star-usage/

There are several undefined names to be fixed. Each of these will raise NameError if executed.

% ruff check .

fluidsynth.py:772:75: F821 Undefined name `chan`
fluidsynth.py:888:12: F821 Undefined name `fluid_synth_set_chorus_speed`
fluidsynth.py:889:20: F821 Undefined name `fluid_synth_set_chorus_speed`
fluidsynth.py:893:12: F821 Undefined name `fluid_synth_set_chorus_depth`
fluidsynth.py:894:20: F821 Undefined name `fluid_synth_set_chorus_depth`
fluidsynth.py:1002:64: F821 Undefined name `name`
fluidsynth.py:1002:83: F821 Undefined name `name`
Found 7 errors.

% ruff rule F821

undefined-name (F821)

Derived from the Pyflakes linter.

What it does

Checks for uses of undefined names.

Why is this bad?

An undefined name is likely to raise NameError at runtime.

Example

def double():
    return n * 2  # raises `NameError` if `n` is undefined when `double` is called

Use instead:

def double(n):
    return n * 2

References

• Python documentation: Naming and binding