Calling Ghostscript from Python

[Kerstin]

Hi,

I'm trying to call the ghostscript to convert some PS to PDF. I'm
working on Win95, so the os.system() always returns '0'.
When the cmd is running, the DOS-Box opens and I get the error message
"File or directory not found".
I also checked if the PS are readable; and when I change the cmd to
something else (like "md new_dir") it works.

ghost_dir = 'c:\ghost\gs\gs7.00\lib'
cmd = ghost_dir + '\ps2pdf13.bat ' + ps_file + ' ' + pdf_file
os.system(cmd)

I think there must be something wrong with the pathname or rather the
ghost environment. How can I check this?
I'm using full pathnames for 'ps_file' and 'pdf_file' too! Might this
cause problems?

Can anybody help me?
Thanx,
Kerstin