How to pipe input to python line by line from linux program?

Question

I want to pipe the output of ps -ef to python line by line.

The script I am using is this (first.py) -

#! /usr/bin/python

import sys         


        

Answer 1

What you want is popen, which makes it possible to directly read the output of a command like you would read a file:

import os
with os.popen('ps -ef') as pse:
    for line in pse:
        print line
        # presumably parse line now

Note that, if you want more complex parsing, you'll have to dig into the documentation of subprocess.Popen.