Colour in Results block?

[emacs-jupyter]

Colour in Results block?

[nnicandro]

Also as a side note, it looks like you use rainbow-delimiters-mode. You can also enable that in the REPL by adding rainbow-delimiters-mode-enable to jupyter-repl-mode-hook.

[nnicandro]

I did previously try to get color in code block output. The functions used to colorize the ANSI escape sequences in the REPL are the same ones used in the org-mode output block, the difference is that org-mode strips the color for some reason and I haven't put in the time to figure out why yet. Most likely it is related to using text properties to add in the color and how org-mode does its fontification using font-lock.

Thinking about it again, I don't think it is correct to remove the ANSI escape sequences in org-mode output since we lose information that the kernel sent. We should be able to add color by inserting the ANSI escape sequences into the buffer, instead of stripping them and adding the colors as text properties before insertion (which is what the REPL does), and use ansi-color-apply-on-region to overlay them with color. This way we use overlays instead of text properties so we don't interfere with font-lock. The only downside is that overlays are known to slow down editing when there are a lot of them in the buffer.