[wingide-users] Using subprocess in scripts

Michael Foord fuzzyman at voidspace.org.uk
Mon Jan 1 16:13:39 MST 2007

Wingware Support wrote:
> Michael Foord wrote:
>> I would like to use 'subprocess' to launch commands. The 'subprocess' 
>> module isn't included in the Wing 'Python24.zip', so I can't use it. 
>> Any reason why it isn't available ?
> The subprocess module isn't included because Wing doesn't use in 
> internally and Python24.zip only includes the python library modules 
> that Wing uses.  We should probably expand what is included so that 
> scripts may use other modules.
> Ordinarily, I'd suggest that you use the AsyncExecuteCommandLine method 
> on the wingapi Application class, but I think you want to create a new 
> cmd.exe window each time you run the command (actually, you probably 
> don't want to, but it's probably the easiest option to get a console 
> working).  Given that, I came up with the following:

Thanks John; this looks good.


> import wingapi
> import os
> from wingutils import spawn
> def custom_execute(app=wingapi.kArgApplication):
>   editor = app.GetActiveEditor()
>   filename = editor.GetDocument().GetFilename()
>   directory, theFile  = os.path.split(filename)
>   env = app.GetProject().GetEnvironment(filename)
>   cmd = env.get('COMSPEC', 'cmd.exe')
>   argv = [cmd, '/c', 'run_python.bat', filename]
>   spawn.win32_start_process(cmd, argv, env=env, child_pwd=directory,
>                             new_console=True)
> It uses Wing's internal spawn module to get an api to create a new 
> console.  I tried using os.spawn* functions, but couldn't determine how 
> to create a console though I didn't try for very long.  Also, the 
> command gets the environment from the project so that modifications in 
> the project properties are picked up.  This was a flaw in using 
> os.system because os.system uses Wing's internal environment, which is 
> not the same as the environment specified in project properties or the 
> environment that Wing is launched in.
> Cheers,
> John

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