Finding location of an executable in a windows machine?
davea at ieee.org
Fri May 15 20:01:18 CEST 2009
nonsense at mynonsense.net wrote:
> My python script calls another windows program file. I have the path
> to that program hardcoded in it. Is there a way for python to
> automatically find the path to this program?
> testapp_path = "C:\\Program Files\\testapp\\version\\61\\"
> Or do i have to do a brute force approach to searching all drives/
> folders till it finds a path matching my program name?
Do you actually need the path, or do you just want the program to run as
though you had entered it at a command prompt? Many of the APIs for
launching other programs will do a path search, similar to what the DOS
box in Windows does. Try just leaving off the path entirely.
Or you can get the PATH environment variable, parse it, and search for
those locations yourself. But realize that the shell also looks in a
few places not on the path, including at least current directory and
windows directory (eg. c:\windows\system32 ). And you very likely want
to look a few other places, such as in Program Files.
But searching the drives raw is rarely a good idea, as it's quite likely
there's a duplicate filename out there somewhere, and you want a
deterministic algorithm for which one will run.
Depending on how fancy your program is, you may want to do the searching
at install time, and store the result in an xxx.ini file or equivalent.
That file would probably go somewhere in "Documents and Settings"
directory structure, perhaps based on the current user. That way you
can document how the user will customize it.
If you need help on a specific python command, you'd also need to tell
us what version of Python you're using.
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