Debugging automatic quotation in subprocess.Popen()

[c.buhtz at posteo.jp]

Hello,

I need to improve my understanding about how subprocess.Popen() does
quote arguments. I have special case here.

Simple example:
Popen(['ls', '-l']) results on a shell in "ls -l" without quotation.

Quotes are added if they are needed:
Popen(['ls', 'folder with blank']) results on a shell in
"ls 'folder with blank'".

Am I right so far with the basics?

Is there a way to be sure and to debug how Popen() give it to the shell?