real time subprocess.Popen via stdout and PIPE

Question

I am trying to grab stdout from a subprocess.Popen call and although I am achieving this easily by doing:

cmd = subprocess.Popen(\'         


        

Answer 1

To get output "in real time", subprocess is unsuitable because it can't defeat the other process's buffering strategies. That's the reason I always recommend, whenever such "real time" output grabbing is desired (quite a frequent question on stack overflow!), to use instead pexpect (everywhere but Windows -- on Windows, wexpect).