Python实时逐行迭代linux命令输出

Question

在python中我见过很多使用管道的方法，但是它们太复杂了，难以理解。我想写这样的东西:

import os
for cmdoutput_line in os.system('find /'):
  print cmdoutput_line

在没有等待+大缓冲命令输出的情况下，实现它的最简单方法是什么?我不想在命令完成时等待，我只想实时迭代输出。

Answer 1

在while语句中可以逐行读取子进程，

from subprocess import Popen, PIPE, STDOUT
process = Popen('find /', stdout = PIPE, stderr = STDOUT, shell = True)
while True:
  line = process.stdout.readline()
  if not line: break
  print line

Answer 2

from subprocess import Popen, PIPE
def os_system(command):
    process = Popen(command, stdout=PIPE, shell=True)
    while True:
        line = process.stdout.readline()
        if not line:
            break
        yield line

if __name__ == "__main__":
    for path in os_system("find /tmp"):
        print path

Answer 3

试试这个:

import subprocess
sp = subprocess.Popen('find /', shell=True, stdout=subprocess.PIPE)
results = sp.communicate()
print results