如何从终端退出Python脚本

Question

so I am trying to run a python script from terminal and at the end it does not exit the process unit I hit ENTER . I tried to kill the process and use the following, sys.exit() , quit() , raise SystemExit but nothing seem to work. Below is the code I am using. Any ideas please?

# -*- coding: utf-8 -*-
import subprocess, sys, os
from sys import exit
firstarg=sys.argv[1]
service_provider = subprocess.Popen (['ffprobe', '-loglevel', 'fatal', '-select_streams', '-show_entries', 'program_tags', '-of', 'csv=%s' % ("p=0"), '-i', sys.argv[1]], stdout=subprocess.PIPE)
out = service_provider.communicate() [0]
result = out.split('\n')
a = str(result [0])
b = str(result [1])
cmds1 = ['ffmpeg', '-i', sys.argv[1], '-c', 'copy', '-out1.ts']
cmds2 = ['ffmpeg', '-i', sys.argv[1], '-c', 'copy', '-out2.ts']
subprocess.Popen(cmds1)
subprocess.Popen(cmds2)
sys.exit()

Answer 1

I had similar problem when worked with subprocess.Popen, if your Popen subprocessess are not finished it can cause problem.

popenlist in the example is dictionary {'anynameyouchoose:subprocess.Popen()'}

def exit_program(popenlist):
    if len(popenlist):
        for activepopen in popenlist.values():
            activepopen.kill()
    print("The program will be terminated in 5 seconds.\n")
    time.sleep(4)
    print("Bye...\n")
    time.sleep(1)
    sys.exit()

Answer 2

okay, so I managed to get it working by adding the following to the code,

out = cmds1.communicate()
cmds1.kill()

not sure if this is the clean way of doing. Its doing the job but I am getting the following error at the end just before it exits,

Traceback (most recent call last):
  File "pytest8.py", line 23, in <module>
    cmds1.kill()
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/subprocess.py", line 1564, in kill
    self.send_signal(signal.SIGKILL)
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/subprocess.py", line 1554, in send_signal
    os.kill(self.pid, sig)
OSError: [Errno 3] No such process