The sphinx_copybutton extension doesn't properly work out-of-the-box

[mgeier]

The extension adds "copy" buttons to all code areas, including Jupyter code cells, see https://github.com/choldgraf/sphinx-copybutton.

Some CSS to work around the issue is shown in #330 (comment), but it would certainly be nice to make this work out-of-the-box.

Currently, there are several problems:

• the copy buttons are also shown for the prompts, which is quite useless
• the distance from the top and right edge of the code cell is too large (and much larger than it is in "normal" code blocks)
• in Chrome, scrollbars appear on code cells with a single line

Firefox:

Chrome:

[choldgraf]

Could you give this a shot with the latest sphinx-copybutton and see if it works now? Some recent PRs should have cleaned up the CSS a bit

[mgeier]

@choldgraf I have just merged #349 with a few fixes on the nbsphinx side of things.

Copy buttons are now enabled in the latest version of the docs: https://nbsphinx.readthedocs.io/en/latest/

I've also re-based all my theme branches to check it on a variety of themes.

It mostly works great!
But there are a few issues: #376