users/models.py

from django.conf import settings
from django.contrib.auth.models import User
from django.db import models
import pytz


# GENERAL Methods and Classes
#
def get_userprofile(user):
    try:
        profile = user.userprofile
    except UserProfile.DoesNotExist:
        profile = UserProfile(user=user)
        profile.save()
    return profile


def UserprofilerExist(username, data):
    try:
        profile = UserProfile.objects.get(user__username=username)
    except UserProfile.DoesNotExist:
        return False
    return profile.timezone == data['timezone'] and profile.language_code == data['language_code']


# USERPROFILE Model
#
class UserProfile(models.Model):
    user = models.OneToOneField(User, unique=True, on_delete=models.CASCADE)
    timezone = models.CharField(max_length=150, default='UTC', choices=[(t, t) for t in pytz.common_timezones])
    language_code = models.CharField(max_length=150, default='en', choices=settings.LANGUAGES)

    def export_key(self):
        return self.user.username

    def export_data(self):
        rv = {}
        rv['timezone'] = self.timezone
        rv['language_code'] = self.language_code
        return rv

    def import_data(self, data):
        self.timezone = data['timezone']
        self.language_code = data['language_code']
        self.save()