Python code highlighting not identifying variables, modules, methods, or arguments

Bug description

One of our users reported they were seeing some not very colorful examples of Python code, and I didn't think much of it until this moment. I tried creating a custom theme with a bunch of jarring colors, and I observed that a similar script in R is able to highlight much more than what Python is able to highlight, including the function names and parameters.

I'm not sure if this is a Quarto bug or a Skylighting bug, but I thought I would start the conversation here in case it's an issue with the way Quarto implements Skylighting.

Steps to reproduce

1. Clone https://github.com/nickvigilante/code-highlighting-issue
2. quarto preview

Expected behavior

All code elements, including import tokens, variables, modules, methods, and arguments, should be highlighted.

Actual behavior

Some elements are missing highlighting.

Your environment

• IDE: VS Code 1.92.1
• OS: macOS Sonoma 14.6.1

Quarto check output

Quarto 1.5.56
[✓] Checking versions of quarto binary dependencies...
Pandoc version 3.2.0: OK
Dart Sass version 1.70.0: OK
Deno version 1.41.0: OK
Typst version 0.11.0: OK
[✓] Checking versions of quarto dependencies......OK
[✓] Checking Quarto installation......OK
Version: 1.5.56
Path: /Applications/quarto/bin

[✓] Checking tools....................OK
TinyTeX: (not installed)
Chromium: (not installed)

[✓] Checking LaTeX....................OK
Tex: (not detected)

[✓] Checking basic markdown render....OK

[✓] Checking Python 3 installation....OK
Version: 3.10.14 (Conda)
Path: /Users/nickv/miniforge3/bin/python
Jupyter: 5.7.2
Kernels: ir, python3

[✓] Checking Jupyter engine render....OK

[✓] Checking R installation...........OK
Version: 4.4.1
Path: /opt/homebrew/Cellar/r/4.4.1/lib/R
LibPaths:
- /opt/homebrew/lib/R/4.4/site-library
- /opt/homebrew/Cellar/r/4.4.1/lib/R/library
knitr: 1.47
rmarkdown: 2.27

[✓] Checking Knitr engine render......OK

Clone the linked reproduction repository and run quarto preview to compare Python and R highlighting. Then trace whether the missing import tokens, variables, modules, methods, and arguments are handled by Quarto or Skylighting; done means the Python elements listed in the issue receive the expected highlighting.