Different background in current Python cell
reddit / emacs

----------------------------------------------------------------------
wehrad · 2022-05-01 22:06

Hi everyone,

I use the simple but very convenient [code-
cells](https://github.com/astoff/code-cells.el) package to run python
cells. E.g. with the Spyder IDE, the cell where the cursor is
currently in has a different background color, and I'd love to have
that in emacs. Would you have any idea on how to do that?

I guess one idea is to find the closest "# %%" pattern up and down
from cursor and change background color in that region, but I have no
idea how to implement this, also for it to change back to the normal
background when the cursor is not in the cell anymore...



Thank you a lot in advance for your help!

----------------------------------------------------------------------
dpoggio · 2022-05-02 00:10

Check this: https://www.emacswiki.org/emacs/HighlightLibrary
Then you just need to set the region and use `hlt-highlight-region` or
`hlt-unhighlight-region`.

----------------------------------------------------------------------
ainstr · 2022-05-02 01:55

To start, you probably want to look at [code-cells--
bounds](https://github.com/astoff/code-
cells.el/blob/8660bdeedee360e5eb632f1eb1356eb09d7dfbee/code-
cells.el#L107), which integrates those cell start/end patterns.