Converting ANSI output from Jupyter Notebooks using MyST-NB

[thiippal]

Hey!

I'm using MyST-NB for my openly available learning materials on applied language technology.

Right now I'm working on a section where I use a small library named wasabi to highlight output using ANSI colours.

I have added the following line to my conf.py:

nb_render_text_lexer = "myst-ansi"

Based on the documentation, I was under the impression that this would render ANSI outputs as they appear in the Jupyter Notebook. However, I can't get this to work. Am I calling the ANSI lexer correctly?

If you can help me out with this, I promise to submit a pull request to improve the MyST-NB documentation for this part. ✌️

[choldgraf]

Hmmm the ansi outputs docs I would have thought that this would “just work”. What kernel are you using for the notebook? Maybe it is something non standard that’s outputting things in weird ways?

[thiippal]

To the best of my knowledge, wasabi printouts are styled using ANSI, but perhaps @ines can shine a light on this if she has time!

As for the kernel, here's my system information:

Python 3.8.5 (default, Jul 21 2020, 10:42:08) 
Type 'copyright', 'credits' or 'license' for more information
IPython 7.21.0 -- An enhanced Interactive Python. Type '?' for help.

A bit of extra information about Sphinx and MyST-NB config:

Running Sphinx v3.5.2
loading pickled environment... failed
failed: build environment version not current
myst v0.13.5: MdParserConfig(renderer='sphinx', commonmark_only=False, dmath_allow_labels=True, dmath_allow_space=True, dmath_allow_digits=True, update_mathjax=True, enable_extensions=['dollarmath'], disable_syntax=[], url_schemes=None, heading_anchors=None, html_meta=[], footnote_transition=True, substitutions=[], sub_delimiters=['{', '}'])

[thiippal]

Hey @choldgraf any ideas how I should start debugging this? Still can't get it to work.

[choldgraf]

I'm not really sure as I've never used wasabi, but perhaps if you look at the structure of the output in the notebook it will help provide a clue? I'm not super sure how the ANSII parsing works so it's hard to help :-/ maybe @chrisjsewell has thoughts?