emacs-config/elisp/modes/python-mode-settings.el

;;; python-mode-settings.el --- Defines mode settings for python.
;;;
;;; Commentary:
;;;
;;;
;;;   - For each project you will need to install flake8/autopep8 into the virtualenv
;;;   - To set your pyenv use M-x pyenv-mode and select your local virtualenv

;; thx rakan.me
(defun pyenv-activate-current-project ()
  "Automatically activates pyenv version if .python-version file exists."
  (interactive)
  (f-traverse-upwards
   (lambda (path)
     (message path)
     (let ((pyenv-version-path (f-expand ".python-version" path)))
       (if (f-exists? pyenv-version-path)
	   (let ((pyenv-current-version (s-trim (f-read-text pyenv-version-path 'utf-8))))
	     (pyenv-mode-set pyenv-current-version)
	     (message (concat "Setting virtualenv to " pyenv-current-version))))))))

;; Enable pyenv integration.
(if (executable-find "pyenv")
    (use-package pyenv-mode
      :ensure t
      :config
      (pyenv-mode)))

;; Disable elpy default virtualenv (use the pyenv one)
(setq elpy-rpc-virtualenv-path 'current)

;; Enable autopep8
(use-package  py-autopep8
  :ensure t)

(add-hook 'elpy-mode-hook 'py-autopep8-mode)
;; Enable flake8 - requires flake8 in your path so use pyenv/global pip install
(add-hook 'python-mode-hook '(lambda ()
			       (setq flycheck-python-flake8-executable "flake8")
			       (flycheck-select-checker 'python-flake8)
			       (flycheck-mode t)))

;; Activate pyenv automatically if a .python-version is supplied
(if (executable-find "pyenv")
    (add-hook 'python-mode-hook 'pyenv-activate-current-project))

;; Use microsoft's python language server
(add-hook 'python-mode-hook (lambda () (lsp-python-enable)))

(use-package lsp-pyright
  :ensure t
  :hook (python-mode . (lambda ()
                         (require 'lsp-pyright)
                         (lsp-deferred))))  ; or lsp-deferred

;; Python testing helpers
(use-package python-pytest
  :ensure t)