Cannot jump to the declaration of a symbol

[halloleo]

In a Python file like this

from muddle_funcs import muddle_me, demuddle_me
.
.
.
demuddle_me(input, output, muddler, dont_fail)
.
.
.

I have the cursor on the function call to demuddle_me, then I execute eglot-find declaration and I expect to jump to the file muddle_funcs.py where demuddle_me is defined. muddle_funcs.py is in the same directory as the present file.

Emacs returns:

[eglot] Sorry, this server doesn't do :textDocument/declaration

I have pyls installed so what goes wrong?

[joaotavora]

Thanks for starting this conversation. Can you make a small zip or archive or the toy project you're tying this and post it here. It would help. My python chops come and go, it would help to have a sample around and not have to type anything.

[nemethf]

I'm afraid Eglot is right in this case. Pyls does not implement textDocument/declaration. See its hookspecs. Additionally pyls is more or less abandoned. Pylsp is the new pyls, but there seems to be no difference in this regard. (Well, pylsp is almost the same as pyls.)

Have you tried xref-find-definitions or xref-find-references? Maybe those help you jump to the point of the declaration.

[halloleo]

xref-find-definitions works! Thanks.

Interestingly it use something from eglot, because xref-find-definitions does not work without eglot-ensure in the python-mode hook.

What's that? And is xref-find-definitions the preferred way in eglot to find a symbol?