import credentials from different directory, python

Credentials file: 
cd /var/lib/zabbix
cat config.py
url = "http://localhost/zabbix"
username = "Admin"
password = "zabbix"
Main program: 
#!/bin/python
"""
Shows a list of all current issues (AKA tripped triggers)
"""

from pyzabbix import ZabbixAPI

#import credentials from external file
import sys
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)

# Get a list of all issues (AKA tripped triggers)
triggers = zapi.trigger.get(only_true=1,
                            skipDependent=1,
                            monitored=1,
                            active=1,
                            output='extend',
                            expandDescription=1,
                            selectHosts=['host'],
                            )

# Do another query to find out which issues are Unacknowledged
unack_triggers = zapi.trigger.get(only_true=1,
                                  skipDependent=1,
                                  monitored=1,
                                  active=1,
                                  output='extend',
                                  expandDescription=1,
                                  selectHosts=['host'],
                                  withLastEventUnacknowledged=1,
                                  )
unack_trigger_ids = [t['triggerid'] for t in unack_triggers]
for t in triggers:
    t['unacknowledged'] = True if t['triggerid'] in unack_trigger_ids \
        else False

# Print a list containing only "tripped" triggers
for t in triggers:
    if int(t['value']) == 1:
        print("{0} - {1} {2}".format(t['hosts'][0]['host'],
                                     t['description'],
                                     '(Unack)' if t['unacknowledged'] else '')
              )
Byat