[Python-Dev] subprocess shell=True on Windows doesn't escape ^ character

[Florian Bruhin]

* Nikolaus Rath <Nikolaus at rath.org> [2014-06-12 19:11:07 -0700]:
> "R. David Murray" <rdmurray at bitdance.com> writes:
> > Also notice that using a list with shell=True is using the API
> > incorrectly.  It wouldn't even work on Linux, so that torpedoes
> > the cross-platform concern already :)
> >
> > This kind of confusion is why I opened http://bugs.python.org/issue7839.
> 
> Can someone describe an use case where shell=True actually makes sense
> at all?
> 
> It seems to me that whenever you need a shell, the argument's that you
> pass to it will be shell specific. So instead of e.g.
> 
> Popen('for i in `seq 42`; do echo $i; done', shell=True)
> 
> you almost certainly want to do
> 
> Popen(['/bin/sh', 'for i in `seq 42`; do echo $i; done'], shell=False)
> 
> because if your shell happens to be tcsh or cmd.exe, things are going to
> break.

My usecase is a spawn-command in a GUI application, which the user can
use to spawn an executable. I want the user to be able to use the
usual shell features from there. However, I also pass an argument to
that command, and that should be escaped.

Florian

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