Problems with built-in Python mode of Emacs22 on w32

Problems with built-in Python mode of Emacs22 on w32

[Anton V. Belyaev]

I searched the group, but it seems nobody encountered such a problem.

I use Emacs22 (for windows), it has python.el in the distrib. Also I
use Python 2.4.3.

When I am trying to send a statement to Python from Emacs, *Python*
buffer is shown and it says following:

Python 2.4.3 (#69, Mar 29 2006, 17:35:34) [MSC v.1310 32 bit (Intel)]
on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> Traceback (most recent call last):
  File "<stdin>", line 1, in ?
  File "c:\Program Files\Emacs\emacs\etc\emacs.py", line 23, in ?
    import os, sys, traceback, inspect, rlcompleter, __main__
  File "c:\Python24\lib\rlcompleter.py", line 42, in ?
    import readline
ImportError: No module named readline
>>> >>> Traceback (most recent call last):
  File "<stdin>", line 1, in ?
NameError: name 'emacs' is not defined
>>> >>>

Re: Problems with built-in Python mode of Emacs22 on w32

[Eli Zaretskii]

> From: "Anton V. Belyaev" <anton.belyaev@gmail.com>
> Date: 8 Apr 2006 06:54:10 -0700
> Complaints-To: groups-abuse@google.com
> Injection-Info: e56g2000cwe.googlegroups.com; posting-host=195.131.207.90;
> 	posting-account=MJsRpw0AAAB1knIy9XY5Qkoe7pbkNmfZ
> 
> I searched the group, but it seems nobody encountered such a problem.
> 
> I use Emacs22 (for windows), it has python.el in the distrib. Also I
> use Python 2.4.3.
> 
> When I am trying to send a statement to Python from Emacs, *Python*
> buffer is shown and it says following:

Please describe exactly what you do to ``send a statement to Python'',
and preferably also show the statement you tried to send.

Re: Problems with built-in Python mode of Emacs22 on w32

[Anton V. Belyaev]

Any statement actually.
Send means send buffer, region or line to Python interpreter. This can
be done using keys of major mode (I dont remeber which ones exactly).
The error message is printed even if I just switch to interactive
Python mode inside Emacs (C-c C-z, as I remember).

When Emacs starts Python, it executes firstly its own piece of Python
code, provided with Emacs itself. It is a kind of initialization, I
suppose. This code causes error.

Re: Problems with built-in Python mode of Emacs22 on w32

[Stefan Monnier]

> I searched the group, but it seems nobody encountered such a problem.
> I use Emacs22 (for windows), it has python.el in the distrib.  Also I
> use Python 2.4.3.

Please use M-x report-emas-bug RET when reporting such problems.

> When I am trying to send a statement to Python from Emacs, *Python*
> buffer is shown and it says following:

> Python 2.4.3 (#69, Mar 29 2006, 17:35:34) [MSC v.1310 32 bit (Intel)]
> on win32
> Type "help", "copyright", "credits" or "license" for more information.
>>>> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
>   File "c:\Program Files\Emacs\emacs\etc\emacs.py", line 23, in ?
>     import os, sys, traceback, inspect, rlcompleter, __main__
>   File "c:\Python24\lib\rlcompleter.py", line 42, in ?
>     import readline
> ImportError: No module named readline
>>>> >>> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
> NameError: name 'emacs' is not defined
>>>> >>>

Looking at this backtrace, I see that c:\python24\lib\rlcompleter.py
imported `readline' but that `readline' was not found.  That sounds like an
internal problem in this installation of Python.

But googling around I see:

   The rlcompleter module defines a completion function for the readline
   module by completing valid Python identifiers and keywords.
   
   This module is Unix-specific due to its dependence on the readline module.

If you look at ...emacs.../etc/emacs.py you'll see that it refers to
rlcompleter twice: once to import it, and another time in `complete' to
actually use it.
So I guess the best workaround (until the completion feature can be made to
actually work under w32) is to ignore the error at both places.

I've never written Python code so I have no idea if the patch below will
work (wrote it while looking at the online Python manual), but please try it
out and tell me what happens.


        Stefan


--- emacs.py	07 fév 2006 12:22:26 -0500	1.6
+++ emacs.py	10 avr 2006 01:06:03 -0400	
@@ -20,7 +20,10 @@
 # Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 # Boston, MA 02110-1301, USA.
 
-import os, sys, traceback, inspect, rlcompleter, __main__
+import os, sys, traceback, inspect, __main__
+# The rlcompleter module seems to only be available in Unix for now.
+try: import rlcompleter
+except: pass
 
 __all__ = ["eexecfile", "args", "complete", "ehelp", "eimport"]
 
@@ -69,8 +72,8 @@
     """Complete TEXT in NAMESPACE and print a Lisp list of completions.
     NAMESPACE is currently not used."""
     if namespace is None: namespace = __main__.__dict__
-    c = rlcompleter.Completer (namespace)
     try:
+        c = rlcompleter.Completer (namespace)
         if '.' in text:
             matches = c.attr_matches (text)
         else:

Re: Problems with built-in Python mode of Emacs22 on w32

[Alan Mackenzie]

Stefan Monnier <monnier@iro.umontreal.ca> wrote on Mon, 10 Apr 2006
01:09:31 -0400:

> Please use M-x report-emas-bug RET when reporting such problems.

Or even M-x report-emacs-bug.  :-)
                      ^

>         Stefan

-- 
Alan Mackenzie (Munich, Germany)
Email: aacm@muuc.dee; to decode, wherever there is a repeated letter
(like "aa"), remove half of them (leaving, say, "a").

Re: Problems with built-in Python mode of Emacs22 on w32

[Dave Love]

"Anton V. Belyaev" <anton.belyaev@gmail.com> writes:

> I searched the group, but it seems nobody encountered such a problem.

Well it's not the correct place to report such problems, not that
reporting them correctly gets Emacs' Python support fixed :-(.

The version at <URL:http://www.loveshack.ukfsn.org/emacs/> fixes this
and other things.  I don't know whether it's possible easily to make
completion work under MS Windows.