问读取python中的subprocess.PIPE？

import fcntl

import os

import sys

# make stdin a non-blocking file

fd = sys.stdin.fileno()

fl = fcntl.fcntl(fd, fcntl.F_GETFL)

fcntl.fcntl(fd, fcntl.F_SETFL, fl | os.O_NONBLOCK)

# user input handling thread

while mainThreadIsRunning:

      try: input = sys.stdin.readline()

      except: continue

      handleInput(input)

import sys

from subprocess import PIPE, Popen

from threading  import Thread

try:

    from Queue import Queue, Empty

except ImportError:

    from queue import Queue, Empty  # python 3.x

ON_POSIX = 'posix' in sys.builtin_module_names

def enqueue_output(out, queue):

    for line in iter(out.readline, b''):

        queue.put(line)

    out.close()

p = Popen(['myprogram.exe'], stdout=PIPE, bufsize=1, close_fds=ON_POSIX)

q = Queue()

t = Thread(target=enqueue_output, args=(p.stdout, q))

t.daemon = True # thread dies with the program

t.start()

# ... do other things here

# read line without blocking

try:  line = q.get_nowait() # or q.get(timeout=.1)

except Empty:

    print('no output yet')

else: # got line

    # ... do something with line