Gabriel Genellina wrote:
En Sat, 10 Oct 2009 05:57:08 -0300, Steven D'Aprano
<st...@remove-this-cybersource.com.au> escribió:
On Fri, 09 Oct 2009 16:37:28 -0700, Buck wrote:
Here's a scenario. A user does a cvs checkout into some arbitrary
directory and sees this:
project/
+-- python/
+-- animals.py
+-- mammals/
+-- horse.py
+-- otter.py
+-- reptiles/
+-- gator.py
+-- newt.py
+-- misc/
+-- lungs.py
+-- swimming.py
These are all runnable scripts that "just work" with no extra effort or
knowlege, both in the testing scenario above, and for normal users that
run it from some central location (maybe "/tools/mycompany/bin/
mammals").
The frustrating thing, for me, is that all these requirements are met if
you leave the scripts in jumbled into a flat directory.
I bet that's not true. I bet that they Just Work only if the user cd's
into the directory first. In other words, if you have all your scripts in
the directory /tools/mycompany/bin/scripts, this will work:
$ cd /tools/mycompany/bin/scripts
$ animals.py
but this won't:
$ cd /home/username
$ /tools/mycompany/bin/scripts/animals.py
In the first case, it works because the current working directory is
included in the PYTHONPATH, and all the modules you need are there. In
the second, it doesn't because the modules aren't in either the current
directory or any other directory in the PYTHONPATH.
That's my prediction.
Mmm, I predict you won't have much success in your new fortune teller
career... :)
You got it backwards. At least on Windows, the current directory
*isn't* on the Python path, but the directory containing the script
*is* included.
So both alternatives above work.
Are you sure?
------
Python 2.5.4 (r254:67916, Dec 23 2008, 15:10:54) [MSC v.1310 32 bit
(Intel)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> import sys
>>> sys.path
['', <-- current directory?
'C:\\WINDOWS\\system32\\python25.zip',
'C:\\Python25\\DLLs',
'C:\\Python25\\lib',
'C:\\Python25\\lib\\plat-win',
'C:\\Python25\\lib\\lib-tk',
'C:\\Python25',
'C:\\Python25\\lib\\site-packages',
'C:\\Python25\\lib\\site-packages\\win32',
'C:\\Python25\\lib\\site-packages\\win32\\lib',
'C:\\Python25\\lib\\site-packages\\Pythonwin']
------
Microsoft Windows XP [Version 5.1.2600]
(C) Copyright 1985-2001 Microsoft Corp.
c:\temp>type print_path.py
import sys
print sys.path
c:\temp>cd \
C:\>python \temp\print_path.py
['C:\\temp', <-- hmmm, not the current directory
'C:\\WINDOWS\\system32\\python25.zip',
'c:\\python25\\DLLs',
'c:\\python25\\lib',
'c:\\python25\\lib\\plat-win',
'c:\\python25\\lib\\lib-tk',
'c:\\python25',
'c:\\python25\\lib\\site-packages',
'c:\\python25\\lib\\site-packages\\win32',
'c:\\python25\\lib\\site-packages\\win32\\lib',
'c:\\python25\\lib\\site-packages\\Pythonwin']
-----
I just love learning new things! Thanks, Gabriel!
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