pymacs: General question and Installation problem

Question

I am trying to setup emacs for python development.

From what I read, it is recommended to use python-mode.el rather than the default python.el from Emacs 22.3. So I embark on the new adventure.

From what I understand, python-mode has the several dependencies, so I need to install rope, ropemode and ropemacs. Then on top of that I need to install pymacs.

Q: is it correct?

This is my new .emacs now:

(custom-set-variables
  ;; custom-set-variables was added by Custom.
  ;; If you edit it by hand, you could mess it up, so be careful.
  ;; Your init file should contain only one such instance.
  ;; If there is more than one, they won't work right.
 '(inhibit-startup-screen t)
 '(tab-width 4))
(custom-set-faces
  ;; custom-set-faces was added by Custom.
  ;; If you edit it by hand, you could mess it up, so be careful.
  ;; Your init file should contain only one such instance.
  ;; If there is more than one, they won't work right.
 )

(setq emacs-config-path "~/.emacs.d/")
(setq base-lisp-path "~/.emacs.d/site-lisp/")
(setq site-lisp-path (concat emacs-config-path "/site-lisp"))
(defun add-path (p)
  (add-to-list 'load-path (concat base-lisp-path p)))

(add-path "") 
(add-to-list 'load-path "~/.emacs.d")

(require 'psvn)

;; python-mode
;;
(setq auto-mode-alist (cons '("\\.py$" . python-mode) auto-mode-alist))
(setq interpreter-mode-alist (cons '("python" . python-mode) interpreter-mode-alist))
(autoload 'python-mode "python-mode" "Python editing mode." t)


(setq pymacs-load-path '(   "~/.emacs.d/site-lisp/rope"
                            "~/.emacs.d/site-lisp/ropemode"
                            "~/.emacs.d/site-lisp/ropemacs"))


(setq interpreter-mode-alist
      (cons '("python" . python-mode)
        interpreter-mode-alist)
      python-mode-hook
      '(lambda () (progn
            (set-variable 'py-indent-offset 4)
            (set-variable 'py-smart-indentation nil)
            (set-variable 'indent-tabs-mode nil)
            ;;(highlight-beyond-fill-column)
                    (define-key python-mode-map "\C-m" 'newline-and-indent)
            (pabbrev-mode)
            (abbrev-mode)
     )
      )
)


;; 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)

;; Search local path for emacs rope
;;

;; enable pymacs
;; 
(require 'pymacs)
(pymacs-load "ropemacs" "rope-")

Now, when i start emacs, I got this error message:

("C:\\opt\\emacs-22.3\\bin\\emacs.exe")
Loading encoded-kb...done
Loading regexp-opt...done
Loading easy-mmode...done
Loading wid-edit...done
Loading edmacro...done
Loading derived...done
Loading advice...done
Loading cl-macs...done
Loading byte-opt...done


An error has occurred while loading `c:/opt/cygwin/home/akong/.emacs':

File error: Cannot open load file, pymacs

To ensure normal operation, you should investigate and remove the
cause of the error in your initialization file.  Start Emacs with
the `--debug-init' option to view a complete error backtrace.

For information about GNU Emacs and the GNU system, type C-h C-a. [2 times]

To make it slightly more complicated:

For work reason I have to use python 2.4, but I have python 2.6 installed on my PC. But obviously rope does not like 2.4 so I did not run setup.py. I untar/unzip these packages and put these files under ~/.emacs.d/site-lisp. By default if python is invoked in command prompt, it is the python 2.4 executable.

Q: How can I successfully load 'pymacs'?

Carbonization

Answer 1

It turns out I missed these two:

(add-to-list 'load-path "~/.emacs.d/site-lisp/Pymacs-0.23")

Obviously I need to load the pymac script.

And I have set the env var PYMACS_PYTHON to python 2.6 because I am using python 2.4 as default python interpreter, for work reason.

Carbonization

Answer 2

I have never used pymacs so far, but one thing which catches my eye when I look at your .emacs is that you apparently didn't add the pymacs directory to the emacs load-path but only to the pymacs one:

(setq pymacs-load-path '( "~/.emacs.d/site-lisp/rope"
                          "~/.emacs.d/site-lisp/ropemode"
                          "~/.emacs.d/site-lisp/ropemacs"))

You will probably need also something like:

(add-to-list 'load-path "~/.emacs.d/site-lisp/rope")
(add-to-list 'load-path "~/.emacs.d/site-lisp/ropemode")
(add-to-list 'load-path "~/.emacs.d/site-lisp/ropemacs")

(or whereever you have pymacs.el) so that emacs can find the lisp files. Also mentioned in the pymacs documentation

2.4 Install the Pymacs proper ... for the Emacs part ...

This is usually done by hand now. First select some directory along the list kept in your Emacs load-path, for which you have write access, and copy file pymacs.el in that directory.

Carbarn

Alas, added the lines as recommended but no luck. – Carbonization

where do you have pymacs.el then? – Carbarn

Also check your load-path variable if it contains this directory (C-h v: load-path). – Carbarn

I don't think you need (add-to-list 'load-path "~/.emacs.d/site-lisp/rope") and such, because rope, ropemode and ropemacs are python packages loaded via pymacs, so they are just needed to be in PYTHONPATH or pymacs-load-path. There are no Emacs lisp file in ropemacs directory. Please notice there is no (require 'ropemacs) or something like that. – Krishnakrishnah

Answer 3

If paths are missing then this will easily be spotted in the startup log or by getting a backtrace at emacs start. If in doubt M-x load-library is the way to go.

I too am getting company-ropemacs refusing to load with both emacs 23 and emacs 24 after latest Debian Testing updates which then means you can not save files because of rope save hooks. I would be interested to hear from anyone with it working. company-ropemacs and python in general with emacs has been a thorn for some time now. I intend to try and debug it some more later and will update this thread then.

Airdrie