import json
import urllib.request
import time
hostnameList = ['host1','host2','host3']
while True:
    for host in hostnameList:
        apidata = urllib.request.urlopen("http://localhost/jsonapi").read().decode('utf8')
        alive_status = json.loads(apidata)["hosts"][(host)]["alive"]
        if alive_status == True:
            print (str(host) + ' is alive. ')
        else:
            print (str(host) + ' is dead')
    time.sleep(10)

 if alive_status == True:
    if aliveMessageStatus == False:
        print ('alive')
        aliveMessageStatus = True
        deadMessageStatus = False
if alive_status == False:
    if deadMessageStatus == False:
        print ('dead')
        deadMessageStatus = True
        aliveMessageStatus = False

  
state = 'start'
 
while True:
    if state == 'start':
        do1()
        state = 'continue'
    elif state == 'continue':
        res = do2()
        if res = 1:
            state == 'condition':
    elif state == 'condition':
        res = do3()
        if res = 1:
            state = 'continue'
        else:
            state = 'exit'
    elif state == 'exit':
        break

 import json
import urllib.request
import time
aliveMessageSent = False
deadMessageSent = False
while True:
    apidata = urllib.request.urlopen("http://localhost/jsonapi").read().decode('utf8')
    alive_status = json.loads(apidata)["hosts"]['host1']["alive"]
    if alive_status == True:
        if aliveMessageSent == True:
            state = 'wait'
        else:
            print ('Host is alive.')
            aliveMessageSent = True
            deadMessageSent = False
    elif alive_status == False:
        if deadMessageSent == True:
            state = 'wait'
        else:
            print ('Host is dead.')
            deadMessageSent = True
            aliveMessageSent = False
    elif state == 'wait':
        time.sleep(20)