检查选择模块
import subprocess
import select
import time
x=subprocess.Popen(['/bin/bash','-c',"while true; do sleep 5; echo yes; done"],stdout=subprocess.PIPE)
y=select.poll()
y.register(x.stdout,select.POLLIN)
while True:
if y.poll(1):
print x.stdout.readline()
else:
print "nothing here"
time.sleep(1)
非posix系统的线程解决方案：
import subprocess
from threading import Thread
import time
linebuffer=[]
x=subprocess.Popen(['/bin/bash','-c',"while true; do sleep 5; echo yes; done"],stdout=subprocess.PIPE)
def reader(f,buffer):
while True:
line=f.readline()
if line:
buffer.append(line)
else:
break
t=Thread(target=reader,args=(x.stdout,linebuffer))
t.daemon=True
t.start()
while True:
if linebuffer:
print linebuffer.pop(0)
else:
print "nothing here"
time.sleep(1)
602392714
清零编程群