I'm not sure if this is the best place to ask this, but for some reason after installing the latest version of `quarto` from the website, I'm unable to render or build any documents that contain python cells. If I try using an older version, it no longer works either. I'm not sure if I screwed up something by simply downloading and running the latest `.pkg` file for macOS, but the output of `quarto render` or `quarto serve` no longer work with the following `lua` errors:

Using this example from the documentation website (and swapping out to my jupyter kernel, I've tried several I know work outside of quarto):

```
---
title: "matplotlib demo"
format:
  html:
    code-fold: true
jupyter: base
---

For a demonstration of a line plot on a polar axis, see @fig-polar.

```{python}
#| label: fig-polar
#| fig-cap: "A line plot on a polar axis"

import numpy as np
import matplotlib.pyplot as plt

r = np.arange(0, 2, 0.01)
theta = 2 * np.pi * r
fig, ax = plt.subplots(
  subplot_kw = {'projection': 'polar'} 
)
ax.plot(theta, r)
ax.set_rticks([0.5, 1, 1.5, 2])
ax.grid(True)
plt.show()
```

```
quarto render test.qmd

Error running filter /Users/Esh/Documents/pyprojects/quarto-cli/src/resources/filters/quarto-post/quarto-post.lua:
...ts/quarto-cli/src/resources/filters/quarto-post/book.lua:11: attempt to index a nil value (field 'attr')
stack traceback:
        ...i/src/resources/filters/quarto-post/../common/pandoc.lua:50: in function <...i/src/resources/filters/quarto-post/../common/pandoc.lua:44>

```

I've tried installing from the website, removing that version, installing the homebrew version, uninstalling the homebrew version, and building from this git repo locally (that's the last version I tested in the snippet above), but no version works anymore. Is there an installation "side-effect" that I need to reset before upgrading/reinstalling `quarto`? 
I've also tried updating my `pandoc` via homebrew and it's currently at:

```
pandoc 2.12
Compiled with pandoc-types 1.22, texmath 0.12.1.1, skylighting 0.10.4,
citeproc 0.3.0.8, ipynb 0.1.0.1
User data directory: /Users/Esh/.local/share/pandoc
Copyright (C) 2006-2021 John MacFarlane. Web:  https://pandoc.org
This is free software; see the source for copying conditions. There is no
warranty, not even for merchantability or fitness for a particular purpose.
```

Here's the output of `quarto check`. I don't have an R install and because I'm not using R and prior to updating ,when things worked I didn't have R installed either.

```
[✓] Checking Quarto installation......OK
      Version: 99.9.9
      Path: /Users/Esh/Documents/pyprojects/quarto-cli/package/dist/bin

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

[✓] Checking Python 3 installation....OK
      Version: 3.8.5 (Conda)
      Path: /Users/Esh/anaconda3/bin/python
      Jupyter: 4.9.2
      Kernels: pymer4, utilz, py-feat, collab_filter, quarto, base

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

[✓] Checking R installation...........(None)

      Unable to locate an installed version of R.
      Install R from https://cloud.r-project.org/
```

I'm on macOS 12.3.1, currently using the development build of `quarto` but this started when I installed 0.9.533
dragonstyle
2022-06-07T04:57:23Z
ejolly
verify-fixed
closed
Python rendering broke somehow?
https://github.com/quarto-dev/quarto-cli/issues/1085