https://blog.tookdes.org/archives/steam-auto-rebooter.html

reboot_steam.py

#!/usr/bin/env python
#-*- coding:utf-8 -*-

import time
import psutil
from subprocess import call
from subprocess import Popen

# 简介
print "Steam Auto Rebooter v1.0"
print ""
print "Author: [email protected]"
print ""

# 获取 Steam.exe 的路径
def get_speed():
    #统计平均速度的时间
    waittime = 60
    
    #获得当前所有网络流量，单位：MByte
    recv1 = psutil.net_io_counters(pernic=False).bytes_recv/1024.0/1024.0

    #在间隔时间后重新统计流量，计算差值以获得平均速度
    time.sleep(waittime)
    recv2 = psutil.net_io_counters(pernic=False).bytes_recv/1024.0/1024.0
    speed = (recv2 - recv1)/waittime

# 重启 Steam
def win_reboot_steam():
    for proc in psutil.process_iter():
        try:
            pinfo = proc.as_dict(attrs=['pid', 'name'])
        except psutil.NoSuchProcess:
            pass
        else:
            if pinfo['name'] == 'Steam.exe':
                steam_pid = pinfo['pid']
                steam_exe = psutil.Process(steam_pid).exe()
                call('taskkill /F /IM Steam.exe')
                Popen(steam_exe)

# 输入理想的下载速率，单位：MByte/s
pf_speed = raw_input("Input a good speed (MBytes/s):  ")
print ""

# 进入主程序循环
print "Running... Please don't close this window until you finish your downloading."
while 1:
    speed = get_speed()
    if speed < pf_speed:
        win_reboot_steam()
    time.sleep(60)