#code for admin.py

from django.contrib.auth.models import User
from django.contrib import admin
from models import UserProfile

admin.site.unregister(User)

class UserProfileInline(admin.StackedInline):
    model = UserProfile

class UserProfileAdmin(admin.ModelAdmin):
    inlines = [ UserProfileInline, ]
admin.site.register(User, UserProfileAdmin)

#code for form.py

from django import forms
from django.forms import ModelForm
from registration.forms import RegistrationForm
from django.utils.translation import ugettext_lazy as _
from models import UserProfile
#from register.models import
from django.contrib.auth.models import User

class UserRegistrationForm(RegistrationForm):
    GENDER_CHOICES = (
        ('M','Male'),
        ('F','Female'),
                      )
    first_name = forms.CharField(label=_('First Name'), max_length=30, required=True)
    last_name = forms.CharField(label=_('Last Name'), max_length=30)
    gender = forms.CharField(label = _('Gender'), max_length=10)# choices = GENDER_CHOICES)
    dob = forms.DateField(
                          ('%d/%m/%Y',),
                          label=_('Date of Birth'),
                          widget=forms.DateTimeInput(format = '%d/%m/%Y',attrs={ 'class':'input', 'readonly':'readonly', 'size':'15'}
                                                     )
                          )
    city = forms.CharField(max_length=100, label=_('City'))
    class Meta:
        models = UserProfile


#code for model.py

from django.db import models
from django.utils.translation import  ugettext_lazy as _
from django.contrib.auth.models import User, Group

class UserProfile(models.Model):
    GENDER_CHOICES=(
        ('M', 'Male'),
        ('F','Female'),
                    )

    user = models.OneToOneField(User)
    gender = models.CharField(_('Gender'), max_length=1, choices=GENDER_CHOICES, null=False)
    dob = models.DateField(_('Date of Birth'), null=False)
    city = models.CharField(_('City'), max_length=100, null=False)

#code for regbackend.py

from django.contrib.auth.models import User
from forms import  UserRegistrationForm
from models import  UserProfile

def user_created(sender, user, request, **kwargs):
    form = UserRegistrationForm(request.post)
    user_data = User(user=user)
    user_data.first_name = form.data['first_name']
    user_data.last_name = form.data['last_name']
    user_data.save()

    data = UserProfile(user=user)
    data.gender = form.data['gender']
    data.dob = form.data['dob']
    data.user_type = form.data['user_type']
    data.city = form.data['city']
    data.save()

from registration.signals import user_registered
user_registered.connect(user_created, sender = UserProfile)

#code for urls.py

from django.conf.urls import patterns, include, url
from django.contrib import admin
from forms import UserRegistrationForm
#from registration.views import register
#import registration.backends.default.urls as regUrls
#import regbackend

urlpatterns = patterns('',
    url(r'^accounts/register/$', register, {'backend': 'registration.backends.default.DefaultBackend','form_class': UserRegistrationForm}, 'registration_register'),
    (r'^accounts/', include(regUrls)),