Only load Pymacs & Ropemacs when opening a Python file?

Question

I use Pymacs to load ropemacs and rope with the following lines in the .emacs file , as described here .

(autoload 'pymacs-load "pymacs" nil t)
(pymacs-load "ropemacs" "rope-")

However, it significantly slows down Emacs startup because it takes some time to load Ropemacs .

I tried the following line, but loaded Ropemacs every time I opened a Python file:

(add-hook 'python-mode-hook (lambda () (pymacs-load "ropemacs" "rope-")))

Is there a way to perform the operation pymacs-loadwhen opening a Python file, but only if ropemacs and rope are not already loaded?

Answer 1

In my .emacs , I have:

(autoload 'python-mode "my-python-setup" "" t)

And in a separate file my-python-setup.el I save:

(require 'python)
(add-to-list 'auto-mode-alist '("\\.py\\'" . python-mode))
;; Initialize Pymacs
(autoload 'pymacs-apply "pymacs")
(autoload 'pymacs-call "pymacs")
(autoload 'pymacs-eval "pymacs" nil t)
(autoload 'pymacs-exec "pymacs" nil t)
(autoload 'pymacs-load "pymacs" nil t)
;; Initialize Rope
(pymacs-load "ropemacs" "rope-")
(setq ropemacs-enable-autoimport t)

Thus, Pymacs and ropemacs will be downloaded only once. This happens when the first .py file is opened .

Answer 2

This is for eval-after-load.

(eval-after-load "python-mode"
  '(progn
     ;; Do whatever you need to do here. It will only get executed
     ;; after python-mode.el has loaded.
     (require 'pymacs)
     (pymacs-load "ropemacs" "rope-")))

You will need to write "python" instead of "python-mode" if you use python.el instead of python-mode.el .

ropemacs , . - , ropemacs , , , .

Answer 3

This is my decision:

(defun my-python-hook-mode ()
  (interactive)
  (require 'pymacs)
  (autoload 'pymacs-apply "pymacs")
  (autoload 'pymacs-call "pymacs")
  (autoload 'pymacs-eval "pymacs" nil t)
  (autoload 'pymacs-exec "pymacs" nil t)
  (autoload 'pymacs-load "pymacs" nil t)
  (ac-ropemacs-setup)
  (setq ropemacs-confirm-saving 'nil)
  (ropemacs-mode t)
  (define-key python-mode-map "\C-m" 'newline-and-indent)
 )
(add-hook 'python-mode-hook 'my-python-hook-mode)

where it is ac-ropemacs-setupdetermined in the module is automatically filled :

(defun ac-ropemacs-require ()
  (with-no-warnings
    (unless ac-ropemacs-loaded
      (pymacs-load "ropemacs" "rope-")
      (if (boundp 'ropemacs-enable-autoimport)
          (setq ropemacs-enable-autoimport t))
      (setq ac-ropemacs-loaded t))))

(defun ac-ropemacs-setup ()
  (ac-ropemacs-require)
  ;(setq ac-sources (append (list 'ac-source-ropemacs) ac-sources))
  (setq ac-omni-completion-sources '(("\\." ac-source-ropemacs))))

This solution assumes that you are using autocompletion at the same time .