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Is it possible to debug Python scripts line by line using :Termdebug?

:help termdebug-customizing says, that you need a debugger that is "fully compatible with gdb". Is there a debugger for Python that is compatible (using the GDB/MI interface)?

Or are there other alternatives?

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    I don't have the experience to answer you but the plugin python-mode has a feature which allows you to use breakpoints in python see here they also mention the following debuggers: pdb, ipdb, pudb.
    – statox
    Nov 15, 2018 at 9:35
  • @Jakube did you figure out how to do this using Vim's :Termdebug? I am also very interested in how this works without using a bunch of plugins out the gate.
    – FilBot3
    Oct 22, 2020 at 21:17
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    @FilBot3 From what I was able to collect, all the Python debuggers are incompatible with the GDB interfaces, so you can't use them with :Termdebug. You can debug Python with GDB itself, however then you are working on the C-level of the Python application. There is one way that allows you to work with the actual Python code in GDB (see this talk: youtube.com/watch?v=rB9rPdMRxIA), however I haven't tried that yet, so I can't tell from experience.
    – Jakube
    Oct 23, 2020 at 10:33
  • I sounds a little annoying, since you need to use the py- prefix everywhere (py-up instead of up), but in general that approach should work also nicely with :Termdebug.
    – Jakube
    Oct 23, 2020 at 10:33
  • Posted a similar question up on Reddit too. reddit.com/r/vim/comments/jg91dt/…
    – FilBot3
    Oct 23, 2020 at 19:58

3 Answers 3

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For me vimspector looks amazing, and has out-of-the-box Python support.

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    Currently, it is really the best one. Based on VS-Code debugger.
    – eyal karni
    Dec 2, 2020 at 22:44
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    vimspector support for neovim is currently experimental.
    – Jasha
    May 17, 2021 at 9:28
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    Cool. I use regular vim so it never occurred to me.
    – Shay Palachy Affek
    May 20, 2021 at 10:40
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There are alternatives.

Plain ol' pdb can be integrated into vim with

(My own favourite) pudb can be integrated with

And the popular ipdb can be integrated with

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    vimpdb seems to support python 2 only github.com/gotcha/vimpdb#requirements
    – baxx
    Aug 1, 2020 at 11:07
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    This also doesn't answer the OP's question of how to use the built-in Vim functionality. From what I see these plugins all use something that is outside of the Vim Termdebug native funcionality
    – FilBot3
    Oct 22, 2020 at 21:14
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You could simply make shortcuts on python files that imports pdb and add a pdb.set_trace() etc.

But I use PUDB (that is the same, but with syntax highlight and all good graphical stuff) with the command :term python -m pudb %. It basically opens a new split window with the debug, the call stack...

I found that simple and convenient (and I remapped it on <f6>)

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