python subprocess 获取执行结果

# -*- coding:utf-8 -*-
 
from subprocess import *
 
p = Popen('df -Th',
          stdout=PIPE,
          stderr=PIPE,
          shell=True
          )
p.wait()
out = p.stdout.read()
 
print out

p = subprocess.Popen('ffprobe.exe -show_format ./flv/bbb3.flv',
                         stdout=subprocess.PIPE,
                         stderr=subprocess.PIPE,
                         shell=True
                         )
p.wait()
out = p.stdout.read()
print(out.decode("utf-8"))