Can't figure out error in Pyzabbix script

[Molusco]

Hi, Im tying this script that appears in the book "Mastering Zabbix" but it trows me an error "KeyError: 'items'" in the for loop close to the end of the script, I Can't figure out what is wrong, can you help me understand? thanks.

#!/usr/bin/python
from pyzabbix import ZabbixAPI
import sys
import csv
from datetime import datetime
appname = sys.argv[1]
timeformat="%d/%m/%y %H:%M"

zh = ZabbixAPI("http://localhost/zabbix")
zh.login(user="admin", password="zabbix")
applications = zh.application.get(output="shorten", filter={"name":
[appname]})

items = zh.item.get(output="count", applicationids=[x['applicationid']
for x in applications])

triggers = zh.trigger.get(output="refer", itemids=[x['itemid'] for x
in items])

events = zh.event.get(triggerids=[j['triggerid'] for j in triggers])

def gethostname(hostid=''):
return zh.host.get(hostids=hostid, output=['host'])[0]['host']
def getitemname(itemid=''):
return zh.item.get(itemids=itemid, output=['name'])[0]['name']
def gettriggername(triggerid=''):
return zh.trigger.get(triggerids=triggerid,expandDescript ion="1", output=['description'])[0]['description']

eventstable = []
triggervalues = ['OK', 'problem', 'unknown']

for e in events:
eventid = e['eventid']
event = zh.event.get(eventids=eventid,
selectHosts="refer",
selectItems="refer",
selectTriggers="refer",
output="extend")
host = gethostname(event[0]['hosts'][0]['hostid'])
item = getitemname(event[0]['items'][0]['itemid']) <-----------------------------------------KeyError: 'items'
trigger = gettriggername(event[0]['triggers'][0]['triggerid'])
clock = datetime.fromtimestamp(int(event[0]['clock'])).strftime(timeformat)
value = triggervalues[int(event[0]['value'])]
eventstable.append({"Host": host,
"Item": item,
"Trigger": trigger,
"Status": value,
"Time" : clock
})
print(eventstable)

[1berto]

Probably there is no events...
What do you have if ...
print( events )
Before the for ?