How can I get terminal output in python? [duplicate]

Question

I can execute a terminal command using os.system() but I want to capture the output of this command. How can I do this?

Answer 1

>>> import subprocess >>> cmd = [ 'echo', 'arg1', 'arg2' ] >>> output = subprocess.Popen( cmd, stdout=subprocess.PIPE ).communicate()[0] >>> print output arg1 arg2 

There is a bug in using of the subprocess.PIPE. For the huge output use this:

import subprocess import tempfile  with tempfile.TemporaryFile() as tempf:     proc = subprocess.Popen(['echo', 'a', 'b'], stdout=tempf)     proc.wait()     tempf.seek(0)     print tempf.read()