input: 
  from django.db import models
  
  class User(models.Model):
      """This model stores the name, address, and email of a user.
      >>> User(name='John Doe', address='123 Main St', email='john@example.com').save()
      >>> User.objects.get(name='John Doe')
      <User: User object (1)>
      """
      name = models.CharField(max_length=100)
      address = models.CharField(max_length=100)
      email = models.EmailField(max_length=100)
  
output:     def __str__(self):
          return f"User(name='{self.name}', address='{self.address}', email='{self.email}')"