subprocess call must contain quotations

[mleopold]

Hi,

I need to call a subprocess with quotations (imagemagick, I now there is PythonMagick but I want to use subprocess)

Call on command line is:

convert logo: -fill white -draw "rectangle 50,50 400,400" abc.png

which works perfectly. Remark: The quotations have to be set.

Calling this on python could look like:

Code: Alles auswählen

import subprocess
params = ['convert', 'logo:', '-fill', '-draw', '"rectangle 50,50 400,400"', 'abc.png']
subprocess.check_call(params)

which does not word. Reson: rectangle prameter is in bad condition.

I tried several combinations like:

Code: Alles auswählen

params = ['convert', 'logo:', '-fill', '-draw', '"rectangle', '50,50', '400,400"', 'abc.png']
params = ['convert', 'logo:', '-fill', '-draw', '\"rectangle', '50,50', '400,400\"', 'abc.png']

etc.

How can I get the quotations into calling the subprocess?

[snafu]

Just leave out the quotations:

Code: Alles auswählen

params = ['convert', 'logo:', '-fill', '-draw', 'rectangle 50,50 400,400', 'abc.png']
subprocess.check_call(params)

Quotations are meant to tell your shell that something should be interpreted as a single argument. In contrast, the subprocess API takes them as a part of the argument. This is why your code fails.

[mleopold]

Facepalm . Thanks!

[snafu]

BTW: Why did your account switch from speaking German to English?
(search.php?author_id=14028&sr=posts)

[mleopold]

Das war die Macht der Gewohnheit. Zweite Facepalm.

[snafu]

Heute nicht dein Tag, was?