A simple Gist to for Address mixin, When we Address fields in your model include this mixin

AddressMixin.py

__author__ = 'Kamal.S'
__version__ = '0.0.1'

from django.db import models


class AddressMixin(models.Model):
    """
    AddressMixin
    """
    contact_number_1 = models.CharField(max_length=20)
    contact_number_2 = models.CharField(max_length=20, null=True)
    address_1 = models.CharField(max_length=100, null=True)
    address_2 = models.CharField(max_length=100, null=True)
    city = models.CharField(max_length=100)
    pincode = models.IntegerField(max_length=10)

    class Meta:
        abstract = True

    @property
    def get_address(self):
        """
        Returns the Association Address
        """
        address_list = [self.address_1, self.address_2, self.city, 'pin:' + str(self.pincode)]
        return ", ".join([address for address in address_list if address])

    @property
    def get_contacts(self):
        contacts = [self.contact_number_1, self.contact_number_2]
        return ", ".join([str(contact) for contact in contacts if contact])