problem with single-quote and double-quote when using subprocess.

[MRAB]

On Nov 3, 10:47 pm, Evan <xdi... at gmail.com> wrote:
> Hello -
>
> i'm trying to call subprocess.popen on the 'command-based' function in
> linux.  When I run the command from the shell, like so:
>
> goset -f ' "%s %s" name addr ' file_name
>
> it works fine
>
> however when I try to do it in python like so:
>
> p = subprocess.Popen(["goest",'-f \'\"%s %s\" name addr\' ',
> 'file_name'], shell=True)
>
> It always failed.
>
> I also try like so:
>
> p = subprocess.Popen(["goest","-f '\"%s %s\" name addr' ",
> 'file_name'], shell=True)
>
> It also failed.
>
> Does anybody have a good suggestion for this matter? thanks in
> advance.
>
It looks like there are _4_ items on the command line:

    goset
    -f
    ' "%s %s" name addr '
    file_name

so the call should be:

    p = subprocess.Popen(["goest", "-f", "' \"%s %s\" name addr '",
"file_name"], shell=True)

(Untested)