Update some python-mode stuff, and make rainbow delimiters work

elisp/custom.el

@@ -4,7 +4,7 @@
  ;; Your init file should contain only one such instance.
  ;; If there is more than one, they won't work right.
  '(package-selected-packages
-   '(centaur-tabs lsp-pyright magit doom-modeline flycheck-indicator nord-theme powerline rainbow-delimiters python-pytest json-mode company-jedi jedi hl-defined counsel rainbow-identifiers exwm-config all-the-icons-ibuffer slime ivy zerodark-theme zerodark neotree all-the-icons paredit flycheck aggressive-indent aggressive-indent-mode lsp-python-ms py-autopep8 pyenv-mode elpy lsp-ui use-package)))
+   '(color-identifiers-mode centaur-tabs lsp-pyright magit doom-modeline flycheck-indicator nord-theme powerline rainbow-delimiters python-pytest json-mode company-jedi jedi hl-defined counsel rainbow-identifiers exwm-config all-the-icons-ibuffer slime ivy zerodark-theme zerodark neotree all-the-icons paredit flycheck aggressive-indent aggressive-indent-mode lsp-python-ms py-autopep8 pyenv-mode elpy lsp-ui use-package)))
 (custom-set-faces
  ;; custom-set-faces was added by Custom.
  ;; If you edit it by hand, you could mess it up, so be careful.

elisp/modes/default-modes.el

@@ -2,9 +2,11 @@
 
 ;;; Code:
 ;; Easier to identify identifiers
+;; The init add-hook seems to be the only way this works.
+;; :hook does not work with rainbow identifiers for some reason.
 (use-package rainbow-identifiers
   :ensure t
-  :hook ((prog-mode-hook . rainbow-identifiers-mode)))
+  :init (add-hook 'prog-mode-hook 'rainbow-identifiers-mode))
 
 ;; Flycheck is enabled globally.
 (use-package flycheck
@@ -31,8 +33,8 @@
   :commands (lsp lsp-deferred))
 
 (use-package lsp-ui
-    :ensure t
-    :hook (lsp-mode . lsp-ui-mode))
+  :ensure t
+  :hook (lsp-mode . lsp-ui-mode))
 
 (with-eval-after-load 'magit-mode
   (add-hook 'after-save-hook 'magit-after-save-refresh-status t))

elisp/modes/python-mode-settings.el

@@ -22,10 +22,9 @@
 ;; For Python enable Elpy.
 (use-package elpy
   :ensure t
-  :requires jedi
+  :defer t
   :init
-  (elpy-enable)
-  (setq elpy-rpc-backend "jedi"))
+  (advice-add 'python-mode :before 'elpy-enable))
 
 
 ;; Enable pyenv integration.