portable way of locating an executable (like which)

[Gelonida N]

On 09/21/2012 12:04 AM, Jason Swails wrote:
>
Thanks a lot Jason,


> I've used the following in programs I write:
>
> def which(program):
>     def is_exe(fpath):
>        return os.path.exists(fpath) and os.access(fpath, os.X_OK)
>
>     fpath, fname = os.path.split(program)
>     if fpath:
>        if is_exe(program):
>           return program
>     else:
>        for path in os.getenv("PATH").split(os.pathsep):
>           exe_file = os.path.join(path, program)
>           if is_exe(exe_file):
>              return exe_file
>     return None
>
> IIRC, I adapted it from StackOverflow.  I know it works on Linux and Mac
> OS X, but not sure about windows (since I don't know if PATH works the
> same way there).

I'll try it, the script looks reasonably portable (using os.pathsep)
to really replicate which I had probably to add os.getenv('pathext')
as Chris mentioned.
However for my current use case this is not necessarily required.
>
> HTH,
> Jason
>
>
>