exec + subprocess = UnboundLocalError

[paul18fr]

Hi all

In the following code extract, "Launch.wait()" generates an error only if it is inserted in a function (it works in the program core); "Launch" variable does not exist outside the function so it remains a local variable.

I would like to understand what I'm missing (

Thanks

def RunExe(Path, InputFile):
    exec("Launch = subprocess.Popen(['%s\exe', 'name=%s'])" %(Path, InputFile))
    Launch.wait()
    del Launch

Error:
UnboundLocalError: local variable 'Launch' referenced before assignment