This has probably been answered before, but my Google skills have failed
me so far...
Is there an os independent way of checking to see if a particular
executable is on the path? Basically what I want to do is run code like:
i, o, e = os.popen3(executable_name)
but I'd like to give an informative error if 'executable_name' doesn't
refer to an executable on the path.
The idea is to differentiate between errors generated by not being able
to run the program, and errors generated while running the program. The
former is a probably a configuration error by my user, the second is
probably a logic error in my code (or perhaps an error on the executable
I'm calling).
In Windows, I can read the error file, and get something like:
"'<program name>' is not recognized as an internal or external
command,\noperable program or batch file.\n"
and I'm sure I could parse this, but this seems fragile, and clearly os
dependent.
It's not crucial that I use os.popen3 as long as I have access to the
input, output and error files. I played around with subprocess for a
while, but couldn't see any way to do this using that module either.
Thanks for the help,
STeVe
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