  The ``authentication`` module provides a set of pluggable authentication classes.
  
  Authentication behavior is provided by adding the ``AuthMixin`` class to a ``View`` .
  
  The set of authentication methods which are used is then specified by setting
  ``authentication`` attribute on the ``View`` class, and listing a set of authentication classes.
  """
  
  from django.contrib.auth import authenticate
  from django.middleware.csrf import CsrfViewMiddleware
 
</s> remove     """A Resource determines how an object maps to a serializable entity.
    Objects that a resource can act on include plain Python object instances, Django Models, and Django QuerySets."""
 </s> add     """
    A Resource determines how a python object maps to some serializable data.
    Objects that a resource can act on include plain Python object instances, Django Models, and Django QuerySets.
    """ </s> remove         """Wrapped by validate to hide the extra_fields option that the ModelValidatorMixin uses.
 </s> add         """
        Wrapped by validate to hide the extra_fields option that the ModelValidatorMixin uses. </s> remove         expect to see on the input."""
 </s> add         expect to see on the input.
        """ </s> remove         If the 'field-errors' key exists it is a dict of {field name as string: list of errors as strings}."""
 </s> add         If the 'field-errors' key exists it is a dict of {field name as string: list of errors as strings}.
        """ </s> remove         If the 'field-errors' key exists it is a dict of {field name as string: list of errors as strings}."""
 </s> add         If the 'field-errors' key exists it is a dict of {field name as string: list of errors as strings}.
        """
The set of authentication methods which are used is then specified by setting the
  The ``authentication`` module provides a set of pluggable authentication classes.
  
  Authentication behavior is provided by adding the ``AuthMixin`` class to a ``View`` .
  
The set of authentication methods which are used is then specified by setting the
  ``authentication`` attribute on the ``View`` class, and listing a set of authentication classes.
  """
  
  from django.contrib.auth import authenticate
  from django.middleware.csrf import CsrfViewMiddleware
keep keep keep keep replace keep keep keep keep keep
 More tests, getting new serialization into resource 
djangorestframework/authentication.py