title: Using __str__() method in Django on Python 2
body: <p>I am Learning Django using the <a href="https://docs.djangoproject.com/en/1.7/intro/tutorial01/#playing-with-the-api" rel="noreferrer">Django project tutorial</a>. 
  Since I use python 2.7 I am unable to implement the following in python 2.7:</p>
  
  <pre><code>from django.db import models
  
  class Question(models.Model):
  # ...
      def __str__(self):              # __unicode__ on Python 2
          return self.question_text
  
  class Choice(models.Model):
  # ...
      def __str__(self):              # __unicode__ on Python 2
          return self.choice_text
  </code></pre>