a = os.popen(command)
  for line in a.readlines():
    print line

import os

con = os.popen("ping 127.0.0.1","r")
while 1:
    line = con.readline()
    print line.decode('CP866'),
    if not line: break

import os
os.spawnl(os.P_NOWAIT, "/bin/ping", "", "127.0.0.1", "-c3")

import subprocess
subprocess.Popen(["/bin/ping", "127.0.0.1", "-c3"])

from subprocess import Popen, PIPE
pipe = Popen(["/bin/ping", "127.0.0.1", "-c3"], shell=True, stdout=PIPE).stdout