Raspberry PI -PI多个IP

Question

想要的代码分析和修复或指出我在正确的方向，请。这么多的错误，有的克服了，有的没有。

程序运行在覆盆子PI2上，应该尝试和ping特定的IP地址，并返回结果。

这是编程的新手，你大概能看出来！不确定是否需要ping库，或者是否可以不使用ping库

import sys
import time
from pushbullet import Pushbullet
import serial

class Users(object):
    def __init__(self, name=None, ip=None):
        self.name = name
        self.ip = ip
        self.status = 'out'
pb = Pushbullet("xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx") #Pushbullet ID removed

userList = []
userList.append(Users("Ali", "192.18.1.14"))
userList.append(Users("Sophie", "192.18.1.9"))
userList.append(Users("TV", "192.18.1.7"))

try:
    while True: 
        print "Checking... " + time.strftime("%a, %d %b %Y %H:%M:%S", time.gmtime())
        for user in userList:
            result = os.system ("ping -n 1 " = user.ip)
            oldStatus = user.status
            if (result == 0):
                    #What we'll do if a device is detected
                if (oldStatus == 'out'):
                    push = pb.push_note("Home Pi", user.name + " is home")
                    user.status = 'in'
                print user.name + " is home"
            else:
                 #What we'll do if a device is NOT not detected
                if (oldStatus == 'in'):
                    push = pb.push_note("Home Pi", user.name + " has just left")
                    user.status = 'out'
                print user.name + " is out"

        print "Next check will be in 30 seconds"
        time.sleep(30)

        except (KeyboardInterrupt, SystemExit):

Answer 1

我修改了你的代码才能工作，我没有pushbullet。将我的新代码与以前的代码进行比较，看看它们之间的区别和错误

import sys
import time
#from pushbullet import Pushbullet
#import serial
#you need import os
import os

class Users(object):
    def __init__(self, name=None, ip=None):
        self.name = name
        self.ip = ip
        self.status = 'out'
#pb = Pushbullet("xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx") #Pushbullet ID removed

userList = []
userList.append(Users("Notebook", "192.168.1.2"))
userList.append(Users("TV", "192.168.1.4"))

try:
    while True: 
        print "Checking... " + time.strftime("%a, %d %b %Y %H:%M:%S", time.gmtime())
        for user in userList:
            #result = os.system ("ping -n 1 " = user.ip)
        # to concatenate string you need + sign
            #result = os.system("ping -n 1 " + user.ip)
            # -n is a wrong option for ubuntu
            result = os.system("ping -c 1 " + user.ip)
            oldStatus = user.status
            if (result == 0):
                    #What we'll do if a device is detected
                if (oldStatus == 'out'):
                    #push = pb.push_note("Home Pi", user.name + " is home")
                    user.status = 'in'
                print user.name + " is home"
            else:
                 #What we'll do if a device is NOT not detected
                if (oldStatus == 'in'):
                    #push = pb.push_note("Home Pi", user.name + " has just left")
                    user.status = 'out'
                print user.name + " is out"

        print "Next check will be in 30 seconds"
        time.sleep(30)

#wrong identation
except (KeyboardInterrupt, SystemExit):
  sys.exit(0)