[Bug: 21.4.15] [python-mode] when run from python-mode.C+!, the sys.path is not set from environment

[David A. Cobb]

Skip Montanaro wrote:

>    David> If I set my own python library into the environment var
>    David> "PYTHONPATH" then launch 'python' from the shell, the python var
>    David> shell.path is set to PYTHONPATH plus other stuff - as the Python
>    David> Library Manual says it ought to be.
>    ...
>    David> However, if I set up an Xemacs Python Shell thus:
>    David> Buffer: '*Python*',
>    David> python-mode, C+!
>    David> I get "Using Cpython Interpreter", yadda yadda yadda ...
>    >>>> import sys
>    >>>> sys.path
>
>    David> shows that the path is NOT being correctly set up.
>    ...
>
>Hmm...  Works for me (pasted from a shell buffer):
>
>    % env | grep PYTHON
>    PYTHONSTARTUP=/Users/skip/.python.py
>    % . ~/.bashrc
>    % env | grep PYTHON
>    PYTHONSTARTUP=/Users/skip/.python.py
>    % export PYTHONPATH=/path/to/somewhere
>    % python
>    Python 2.4b1 (#52, Oct 17 2004, 13:54:51) 
>    [GCC 3.3 20030304 (Apple Computer, Inc. build 1493)] on darwin
>    Type "help", "copyright", "credits" or "license" for more information.
>    >>> import sys
>    >>> sys.path
>    ['/Users/skip/misc/python/python2', '/Users/skip/misc/python', '', '/Users/skip/local/lib/python2.4', '/Users/skip/local/lib/python2.4/plat-darwin', '/Users/skip/local/lib/python2.4/plat-mac', '/Users/skip/local/lib/python2.4/plat-mac/lib-scriptpackages', '/Users/skip/local/lib/python2.4/lib-tk', '/Users/skip/local/lib/python2.4/lib-dynload', '/Users/skip/local/lib/python2.4/site-packages', '/Users/skip/local/lib/automatrix/python']
>    >>> 
>    % python -S
>    Python 2.4b1 (#52, Oct 17 2004, 13:54:51) 
>    [GCC 3.3 20030304 (Apple Computer, Inc. build 1493)] on darwin
>    >>> import sys
>    >>> sys.path
>    ['/Users/skip/misc/python/python2', '/Users/skip/misc/python', '', '/Users/skip/local/lib/python2.4/', '/Users/skip/local/lib/python2.4/plat-darwin', '/Users/skip/local/lib/python2.4/plat-mac', '/Users/skip/local/lib/python2.4/plat-mac/lib-scriptpackages', '/Users/skip/local/lib/python2.4/lib-tk', '/Users/skip/local/lib/python2.4/lib-dynload']
>    >>> 
>    % unset PYTHONSTARTUP
>    % python -S
>    Python 2.4b1 (#52, Oct 17 2004, 13:54:51) 
>    [GCC 3.3 20030304 (Apple Computer, Inc. build 1493)] on darwin
>    >>> import sys
>    >>> sys.path
>    ['', '/path/to/somewhere', '/Users/skip/local/lib/python24.zip', '/Users/skip/local/lib/python2.4/', '/Users/skip/local/lib/python2.4/plat-darwin', '/Users/skip/local/lib/python2.4/plat-mac', '/Users/skip/local/lib/python2.4/plat-mac/lib-scriptpackages', '/Users/skip/local/lib/python2.4/lib-tk', '/Users/skip/local/lib/python2.4/lib-dynload']
>    >>> 
>
>Note that because I fart around with sys.path in my PYTHONSTARTUP file I
>needed to unset that variable to get things to start right.  Also, running
>the interpreter with the -S flag when trying to debug these sorts of
>problems will disable import of the site module and thus eliminate it as a
>suspect.  (I'm not saying you're necessarily incorrect in your assertion,
>just that you haven't eliminated all local sources that are out of XEmacs's
>and Python's control.)
>  
>
Well, lessee -- I don't have a PYTHONSTARTUP and I don't have an "-S" on 
the Python command.  According to 'custom' -- python group -- the Python 
Command Args are ("-i" "-E" "-u").

Oh, spit!!
A quick 'man python' shows that "-E" says to ignore the Environment.
Seems like a dumb default!!  But, then, I'm new here in Pythonville, myself.

-- 
David A. Cobb, Software Engineer, Public Access Advocate
"By God's Grace, I am a Christian man; by my actions a great sinner." -- The Way of a Pilgrim: R.French, Tr.
Life is too short to tolerate crappy software!