Update host 'Visible name', 'Description' from values already gathered in DB

#!/usr/bin/python
"""
Shows a list of all current issues (AKA tripped triggers)
"""

#for argument support
import sys

#pip install pyzabbix
from pyzabbix import ZabbixAPI

#import api credentials from different file
sys.path.insert(0,'/var/lib/zabbix')
import config

# The hostname at which the Zabbix web interface is available
ZABBIX_SERVER = config.url

zapi = ZabbixAPI(ZABBIX_SERVER)

# Login to the Zabbix API
zapi.login(config.username, config.password)

#query host id by parsing hostname as argument 1
hosts = zapi.host.get (
                output=['hostid'],
                filter={'host': sys.argv[1]})

#extract hostid from json string. host['hostid'] is array element with string identifier
for host in hosts:
        hostid = host['hostid']
print host
#look for last value. key_ is the name of column. sysName is name of 'item key' in zabbix
items = zapi.item.get(
                hostids=hostid,
                output=['lastvalue'],
                filter={'key_':'system.name'})

#assign item lastvalue to dev_name
for item in items:
        print item['lastvalue']
        dev_name = item['lastvalue']

#if nothing has assigned. if nothing kas placed in variable then python assigns 0 to it
if dev_name == '0':
        sys.exit("Sytem name not found !")

#get decription
items = zapi.item.get(
                hostids=hostid,
                output=['lastvalue'],
                filter={'key_':'system.descr'})

#assign last value
for item in items:
        dev_desc = item['lastvalue']

items = zapi.item.get(
                hostids=hostid,
                output=['lastvalue'],
                filter={'key_':'system.location'})

#generate full description sentence
for item in items:
        dev_desc = 'Location: ' + item['lastvalue'] + '\n\n' + dev_desc


#update host 'Visible name' and 'Description'
zapi.do_request('host.update', {'hostid': hostid,'name': dev_name,'description': dev_desc})
And the last line will update name and description:
#update host 'Visible name' and 'Description'
zapi.do_request('host.update', {'hostid': hostid,'name': dev_name,'description': dev_desc})
From zabbix server site there is action defined:
And here is where the magic happens by invoking:
/usr/lib/zabbix/externalscripts/update-host-info-from-item.py {DISCOVERY.DEVICE.IPADDRESS}
Usage directly from command line:
cd /usr/lib/zabbix/externalscripts
./update-host-info-from-item.py 192.168.99.1
P.S. make sure you take care of conflicting error messages under Report -> Audit log:
Byat