How to store the return value of os.system that it has printed to stdout in python? [duplicate]

Answer 1

a=os.popen("your command").read()

new result stored at variable a :)

Answer 2

netstat -plant | awk '{print $4}' | grep %s:%s | wc -l

You can use Python to do the splitting, grepping and counting:

process = subprocess.Popen(['netstat', '-plant'], stdout=subprocess.PIPE)

num_matches = 0

host_and_port = "%s:%s" % (ip, port)

for line in process.stdout:
    parts = line.split()
    if parts[3] == host_and_port: # or host_and_port in parts[3]
        num_matches += 1


print num_matches

Answer 3

import subprocess
p = subprocess.Popen('my_command', stdout=subprocess.PIPE, stderr=subprocess.PIPE, shell=True)
out, error = p.communicate()

Answer 4

import subprocess
p = subprocess.Popen('my_command', stdout=subprocess.PIPE, stderr=subprocess.PIPE)
out, error = p.communicate()