Can't access models from the script initialized in init.py - django

Question

Can U tell me how to access models before all the apps gets loaded
This is my mqtt.py which was initialized in init.py and accessing
models
import paho.mqtt.client as mqtt
from Transport.models import BusPosition
# Broker CONNACK response
def on_connect(client,userdata,flags,rc):
print ("Connected with result code "+str(rc))
# Subcribing to topic and recoonect for
client.subscribe("trackrkct")
#Receive message
def on_message(client,userdata,msg):
print(msg.topic+" "+str(msg.payload))
BusPosition.create(1, "Mon, 23 May 2016 08:30:15 GMT", 11.0998, 77.9098)
client = mqtt.Client()
client.on_connect = on_connect
client.on_message = on_message
client.connect("broker.hivemq.com",1883,60)
This is my init.py where mqtt.py was initialized
from kctsmarttransport import mqtt
mqtt.client.loop_start()
and this is my models.py
from __future__ import unicode_literals
from django.db import models
class BusPosition(models.Model):
bus = models.ForeignKey(Bus)
time = models.DateTimeField
lat = models.FloatField(max_length=20)
lng = models.FloatField(max_length=20)
#classmethod
def create(cls,bus,time,lat,lng):
busPosition = cls(bus=bus,time=time,lat=lat,lng=lng)
busPosition.save()
return busPosition
and I got these errors as apps aren't loaded yet
"C:\Program Files (x86)\JetBrains\PyCharm 2016.2.3\bin\runnerw.exe" C:\Users\Navin\DjangoProject\kct_transport_env\Scripts\python.exe C:/Users/Navin/DjangoProject/kctsmarttransport/manage.py runserver 5000
Traceback (most recent call last):
File "C:/Users/Navin/DjangoProject/kctsmarttransport/manage.py", line 22, in <module>
execute_from_command_line(sys.argv)
File "C:\Users\Navin\DjangoProject\kct_transport_env\lib\site-packages\django\core\management\__init__.py", line 367, in execute_from_command_line
utility.execute()
File "C:\Users\Navin\DjangoProject\kct_transport_env\lib\site-packages\django\core\management\__init__.py", line 316, in execute
settings.INSTALLED_APPS
File "C:\Users\Navin\DjangoProject\kct_transport_env\lib\site-packages\django\conf\__init__.py", line 53, in __getattr__
self._setup(name)
File "C:\Users\Navin\DjangoProject\kct_transport_env\lib\site-packages\django\conf\__init__.py", line 41, in _setup
self._wrapped = Settings(settings_module)
File "C:\Users\Navin\DjangoProject\kct_transport_env\lib\site-packages\django\conf\__init__.py", line 97, in __init__
mod = importlib.import_module(self.SETTINGS_MODULE)
File "c:\python27\Lib\importlib\__init__.py", line 37, in import_module
__import__(name)
File "C:\Users\Navin\DjangoProject\kctsmarttransport\kctsmarttransport\__init__.py", line 1, in <module>
from kctsmarttransport import mqtt
File "C:\Users\Navin\DjangoProject\kctsmarttransport\kctsmarttransport\mqtt.py", line 2, in <module>
from Transport.models import BusPosition
File "C:\Users\Navin\DjangoProject\kctsmarttransport\Transport\models.py", line 6, in <module>
class Bus(models.Model):
File "C:\Users\Navin\DjangoProject\kct_transport_env\lib\site-packages\django\db\models\base.py", line 105, in __new__
app_config = apps.get_containing_app_config(module)
File "C:\Users\Navin\DjangoProject\kct_transport_env\lib\site-packages\django\apps\registry.py", line 237, in get_containing_app_config
self.check_apps_ready()
File "C:\Users\Navin\DjangoProject\kct_transport_env\lib\site-packages\django\apps\registry.py", line 124, in check_apps_ready
raise AppRegistryNotReady("Apps aren't loaded yet.")
django.core.exceptions.AppRegistryNotReady: Apps aren't loaded yet.
Process finished with exit code 1