Add System Path?!?

[andrea_gavana@tin.it]

Hello NG,

I have a GUI (written in wxPython) that calls some external exe files..
Some of them requires that I add to the PATH variable 1 directory. Basically,
the exe are located in:

/MyApp/Solvers/FirstExe
/MyApp/Solvers/SecondExe

And so on, while the dll needed by these exe are located in:

/MyApp/MyDll

These exe files do not work if I don't set the PATH variable also to that
adress. I know I can do it by hand (and also my users can), but I wonder
if there is a way to do it in Python...

Thank you for all suggestions/pointers.

Andrea.

[Martin v. Löwis]

Re: Add System Path?!?

andrea_gavana@t in.it wrote:[color=blue]
> These exe files do not work if I don't set the PATH variable also to that
> adress. I know I can do it by hand (and also my users can), but I wonder
> if there is a way to do it in Python...[/color]

You didn't mention what operating system you are using. On Unix, PATH
is an environment variable, and environment variables can be set in
a process and all child processes, but not in a parent process. So if
you can somehow arrange that the processes that need the PATH setting
are child processes of a Python interpreter, this could be possible.

If you were hoping that you invoke a Python script, and that modifies
the environments of already-running shells - that is not possible.

Regards,
Martin

[rbt]

Re: Add System Path?!?

andrea_gavana@t in.it wrote:[color=blue]
> Hello NG,
>
> I have a GUI (written in wxPython) that calls some external exe files.
> Some of them requires that I add to the PATH variable 1 directory. Basically,
> the exe are located in:
>
> /MyApp/Solvers/FirstExe
> /MyApp/Solvers/SecondExe
>
> And so on, while the dll needed by these exe are located in:
>
> /MyApp/MyDll
>
> These exe files do not work if I don't set the PATH variable also to that
> adress. I know I can do it by hand (and also my users can), but I wonder
> if there is a way to do it in Python...
>
> Thank you for all suggestions/pointers.
>
> Andrea.
>
>[/color]

Check out the 'Path' value under this registry key:

"HKEY_LOCAL_MAC HINE\SYSTEM\Cur rentControlSet\ Control\Session
Manager\Environ ment"

You can import _winreg to edit it as you like. I think it's a string...
just append your path(s) to them.

rbt

[Fouff]

Re: Add System Path?!?

andrea_gavana@t in.it a écrit :[color=blue]
> Hello NG,
>
> I have a GUI (written in wxPython) that calls some external exe files.
> Some of them requires that I add to the PATH variable 1 directory. Basically,
> the exe are located in:
>
> /MyApp/Solvers/FirstExe
> /MyApp/Solvers/SecondExe
>
> And so on, while the dll needed by these exe are located in:
>
> /MyApp/MyDll
>
> These exe files do not work if I don't set the PATH variable also to that
> adress. I know I can do it by hand (and also my users can), but I wonder
> if there is a way to do it in Python...
>
> Thank you for all suggestions/pointers.
>
> Andrea.
>
>[/color]
Why not just adding in your app

import os
os.environ['PATH'] += ";the_new_adres s_needed_by_exe "

this will just modify locally to your app the environement variable PATH

If you want to modify it for ever, just open a console DOS (cmd.exe) and
type:
set PATH=%PATH%;the _new_adress_nee ded_by_exe