Python script to monitor Prometheus exporters

#!/usr/bin/python3.6
# This script call the prometheus target API and check the status of target's status.
# If it found any down in targets it will append failed_hosts list and print it with exit code 2
# Auther: arunlal.a

# Importing modules
import json
import requests
import collections
import sys
import socket

# Empty list
failed_hosts = []

# checking prometheus connectivity
s = socket.socket()
address = '0.0.0.0'
port = 9090
try:
   s.connect((address, port))
except Exception as e:
    print("Prometheus connectivity check failed %s:%d. Exception is %s" % (address, port, e))
    sys.exit(2)
finally:
    s.close()

# Calling Prometheus target API
req=requests.get('http://0.0.0.0:9090/api/v1/targets')
out=req.json()
out1=(out['data'])
dict=out1['activeTargets']
for i in dict:
    if i['health'] == 'down':
       str=i['labels']['instance']
       failed_hosts.append(str.split(":")[0])

if len(failed_hosts) == 0:
        print("All hosts' status are good!!")
else:
        print("Following hosts have issues. You're loosing metrics. It's crutical check https://prometheus.your-domain.com/targets and fix asap!!")
        for x in range(len(failed_hosts)):
                print(failed_hosts[x])
        sys.exit(2)