subprocess cwd keyword.

[Ivan Vinogradov]

Dear All,

I would greatly appreciate a nudge in the right direction concerning  
the use of cwd argument in the call function from subprocess module.

The setup is as follows:

driver.py		<- python script
core/  			<- directory
	main		<- fortran executable in the core directory


driver script generates some input files in the core directory. Main  
should do its thing and dump the output files back into core.
The problem is, I can't figure out how to do this properly.

call("core/main") works but uses .. of core for input/output.

call("core/main",cwd="core") and call("main",cwd="core") both result in
   File "driver.py", line 47, in <module>
     main()
   File "driver.py", line 40, in main
     print "OUT", call("core/main", cwd="core")
   File "/Library/Frameworks/Python.framework/Versions/2.5/lib/ 
python2.5/subprocess.py", line 443, in call
     return Popen(*popenargs, **kwargs).wait()
   File "/Library/Frameworks/Python.framework/Versions/2.5/lib/ 
python2.5/subprocess.py", line 593, in __init__
     errread, errwrite)
   File "/Library/Frameworks/Python.framework/Versions/2.5/lib/ 
python2.5/subprocess.py", line 1051, in _execute_child
     raise child_exception
OSError: [Errno 2] No such file or directory

perhaps if subprocess would indicate the abs path of the object in  
question I could figure it out, but as is I'm lost.
    	
--
Cheers, Ivan.