python使用subprocess查看进程并过滤

来源： https://stackoverflow.com/questions/6780035/how-to-run-ps-cax-grep-something-in-python

将proc1的输出当作proc2的输入来实现

import subprocess

proc1 = subprocess.Popen(["ps","-ef"],stdout=subprocess.PIPE)
proc2 = subprocess.Popen(['grep', 'mysql'], stdin=proc1.stdout,
     stdout=subprocess.PIPE, stderr=subprocess.PIPE)
proc1.stdout.close() # Allow proc1 to receive a SIGPIPE if proc2 exits.
out, err = proc2.communicate()
outline = '{0}'.format(out)