elpy-company-backend not working but company-jedi does

[SirSharpest]

Summary

I'm having an issue where when I try to use elpy-company-backend. This doesn't work for me, however if I do company-jedi it works perfectly.

Have I configured something wrong or is this an error?

My configuration

Linux

    ;; PYTHON CONFIGURATION
      ;; --------------------------------------
  (use-package flycheck
    :ensure t
    :init
    (global-flycheck-mode t))

  ;; Load up elpy
  (elpy-enable)
  (setq elpy-rpc-python-command "python3")
  (setq python-shell-interpreter "ipython3"
    python-shell-interpreter-args "-i --simple-prompt")

  (add-hook 'python-mode-hook 'jedi:setup)
  (define-key python-mode-map (kbd "M-.") 'jedi:goto-definition)
  (setq jedi:complete-on-dot t)

    ;; use flycheck not flymake with elpy
  (when (require 'flycheck nil t)
  (setq elpy-modules (delq 'elpy-module-flymake elpy-modules))
      (add-hook 'elpy-mode-hook 'flycheck-mode)
      (setq flycheck-python-pylint-executable "pylint3")
      (setq flycheck-python-flake8-executable "flake8")
      )
  ;; enable autopep8 formatting on save
  (require 'py-autopep8)
  (add-hook 'elpy-mode-hook 'py-autopep8-enable-on-save)

Result of (elpy-config)

Elpy Configuration

Virtualenv........: cv (/home/nathan/.virtualenvs/cv)
RPC Python........: 3.6.5 (/home/nathan/.virtualenvs/cv/bin/python3)
Interactive Python: ipython3 (/home/nathan/.virtualenvs/cv/bin/ipython3)
Emacs.............: 27.0.50
Elpy..............: 1.21.0
Jedi..............: 0.12.0
Rope..............: Not found (0.10.7 available)
Autopep8..........: Not found (1.3.5 available)
Yapf..............: Not found (0.22.0 available)
Black.............: Not found (18.6b2 available)
Syntax checker....: flake8 (/usr/local/bin/flake8)

[galaunay]

Everything seems ok with your configuration, so It may be an error.

Can you use the other elpy functionalities (elpy-goto-definition and elpy-doc for example) ?
Also could you try (elpy-rpc-get-completions) with the cursor on something to complete, just to try to understand where the issue come from.

By the way, company-jedi uses jedi-core while elpy implements its own mechanism to call jedi. In consequence, elpy-module-company and company-jedi are kind of redondant and you may end up having two process searching for completion if you use both of them.

[azzamsa]

By the way, company-jedi uses jedi-core while elpy implements its own mechanism to call jedi. In consequence, elpy-module-company and company-jedi are kind of redondant and you may end up having two process searching for completion if you use both of them.

I also prejudiced the same thing. Thanks for the input. Today I can't get completion working in PyQt5. I think it was a clash between company and auto-complete (previously I think Elpy use auto-complete). Turn out Elpy use company.

Removing company-jedi config works for me. Now I get pyqt5 completion with 'vanilla' Elpy.

I was wondering how it possible, without reading the code I get your explanation above, thank you.

@galaunay So, the 'recommended' way of using Elpy is: without any additional python related package e.g company-jedi. Because Elpy already handle it out of the box, adding them just making it clash ?

[galaunay]

@galaunay So, the 'recommended' way of using Elpy is: without any additional python related package e.g company-jedi. Because Elpy already handle it out of the box, adding them just making it clash ?

Exactly, one of Elpy's aim is to provide a complete python IDE without the burden of installing separated packages.

Happy that it is now working for you,
please close this issue if your issue is resolved.

[azzamsa]

I am not the OP :)

[galaunay]

oops,
let's wait for SirSharpest then.

[azzamsa]

Exactly, one of Elpy's aim is to provide a complete python IDE without the burden of installing separated packages.

Alright, this is Elpy gooal.

Thanks for the input.