NameError: name 'ALLOWED_STYLES' is not defined on import

[auxym]

nbconvert version 7.16.6

Python 3.12.7

Simply importing nbconvert produces the following stack trace:

❯ python -m nbconvert
C:\Users\thef2102\source\mrfsplus_code\data analysis\.venv\Lib\site-packages\nbconvert\filters\strings.py:23: UserWarning: The installed bleach/tinycss2 do not provide CSS sanitization, please upgrade to bleach >=5
  from nbconvert.preprocessors.sanitize import _get_default_css_sanitizer
Traceback (most recent call last):
  File "<frozen runpy>", line 189, in _run_module_as_main
  File "<frozen runpy>", line 148, in _get_module_details
  File "<frozen runpy>", line 112, in _get_module_details
  File "C:\Users\thef2102\source\mrfsplus_code\data analysis\.venv\Lib\site-packages\nbconvert\__init__.py", line 6, in <module>
    from . import filters, postprocessors, preprocessors, writers
  File "C:\Users\thef2102\source\mrfsplus_code\data analysis\.venv\Lib\site-packages\nbconvert\filters\__init__.py", line 8, in <module>
    from .markdown import (
  File "C:\Users\thef2102\source\mrfsplus_code\data analysis\.venv\Lib\site-packages\nbconvert\filters\markdown.py", line 16, in <module>
    from .markdown_mistune import markdown2html_mistune
  File "C:\Users\thef2102\source\mrfsplus_code\data analysis\.venv\Lib\site-packages\nbconvert\filters\markdown_mistune.py", line 21, in <module>
    from nbconvert.filters.strings import add_anchor
  File "C:\Users\thef2102\source\mrfsplus_code\data analysis\.venv\Lib\site-packages\nbconvert\filters\strings.py", line 23, in <module>
    from nbconvert.preprocessors.sanitize import _get_default_css_sanitizer
  File "C:\Users\thef2102\source\mrfsplus_code\data analysis\.venv\Lib\site-packages\nbconvert\preprocessors\sanitize.py", line 48, in <module>
    class SanitizeHTML(Preprocessor):
  File "C:\Users\thef2102\source\mrfsplus_code\data analysis\.venv\Lib\site-packages\nbconvert\preprocessors\sanitize.py", line 66, in SanitizeHTML
    default_value=ALLOWED_STYLES,  # type:ignore[arg-type]
                  ^^^^^^^^^^^^^^
NameError: name 'ALLOWED_STYLES' is not defined. Did you mean: 'ALLOWED_TAGS'?

The bleach warning is odd, as it says to install bleach > 5, yet I have 6.2.0 installed.

❯ python
Python 3.12.7 (tags/v3.12.7:0b05ead, Oct  1 2024, 03:06:41) [MSC v.1941 64 bit (AMD64)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> import bleach
>>> bleach.__version__
'6.2.0'
>>>

[acrosby]

Same error for my in this particular environment:

Python 3.11.2 | packaged by conda-forge | (main, Mar 31 2023, 17:51:05) [GCC 11.3.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import bleach
>>> bleach.__version__
'6.2.0'
>>>

nbconvert is 7.16.6 from pypi

In my case the bleach version seems to be solved as a dependency of panel

If I add nbconvert as a conda-forge dependency with pixi, I still get 7.16.6, but it no longer throws the error.