[Python-mode] [ python-mode-Bugs-1448154 ] Setting py-python-command after M-x py-shell doesn't work

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Bugs item #1448154, was opened at 2006-03-12 00:56
Message generated for change (Comment added) made by edloper
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Category: None
Group: None
Status: Open
Resolution: None
Priority: 5
Submitted By: Nicholas Sandow (njsand)
Assigned to: Nobody/Anonymous (nobody)
Summary: Setting py-python-command after M-x py-shell doesn't work

Initial Comment:
If I do M-x py-shell, I get an error:

"Searching for program: no such file or directory, python"

That's ok, I just need to set `py-python-command', right?
(setq py-python-command "c:/python24/python.exe")

Then I do M-x py-shell again, I get the same error message:

"Searching for program: no such file or directory, python"

Why didn't setting py-python-command work?

However, if I switch to another buffer, (actually a
buffer in which I haven't tried M-x py-shell before
setting `py-python-command') M-x py-shell will now work.

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>Comment By: Edward Loper (edloper)
Date: 2006-03-12 14:35

Message:
Logged In: YES 
user_id=195958

There's a buffer-local variable "py-which-shell," which is 
used to record what shell command you're using (and 
also "py-which-args"); this gets initialized the first 
time you run py-shell.  It appears that the reasoning 
behind this has to do with toggling between cpython and 
jython, but it's not entirely clear to me from looking at 
the code.  

One way to make things a little more user friendly would 
be to add an initializer function to the defcustom that 
defines py-python-command, that calls "(py-toggle-
shells 'cpython)"; but in your case, that wouldn't have 
helped, since you directly modified py-python-command 
using setq, rather than customize-variable.

If you just want to get things working in that one buffer, 
the following should work:

(setq py-python-command "c:/python24/python.exe")
(py-toggle-shells 'cpython)

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