Include import paths throughout docs.

Closes #1051.  Thanks to @pydanny for the report.

1 files changed, 14 insertions, 0 deletions

diff --git a/docs/api-guide/authentication.md b/docs/api-guide/authentication.md
index b1ab4622..f30b16ed 100755
--- a/docs/api-guide/authentication.md
+++ b/docs/api-guide/authentication.md
@@ -46,6 +46,11 @@ The default authentication schemes may be set globally, using the `DEFAULT_AUTHE
 You can also set the authentication scheme on a per-view or per-viewset basis,
 using the `APIView` class based views.
 
+    from rest_framework.authentication import SessionAuthentication, BasicAuthentication
+    from rest_framework.permissions import IsAuthenticated
+    from rest_framework.response import Response
+    from rest_framework.views import APIView
+
     class ExampleView(APIView):
         authentication_classes = (SessionAuthentication, BasicAuthentication)
         permission_classes = (IsAuthenticated,)
@@ -157,11 +162,16 @@ The `curl` command line tool may be useful for testing token authenticated APIs.
 
 If you want every user to have an automatically generated Token, you can simply catch the User's `post_save` signal.
 
+    from django.dispatch import receiver
+    from rest_framework.authtoken.models import Token
+
     @receiver(post_save, sender=User)
     def create_auth_token(sender, instance=None, created=False, **kwargs):
         if created:
             Token.objects.create(user=instance)
 
+Note that you'll want to ensure you place this code snippet in an installed `models.py` module, or some other location that will be imported by Django on startup.
+
 If you've already created some users, you can generate tokens for all existing users like this:
 
     from django.contrib.auth.models import User
@@ -336,6 +346,10 @@ If the `.authenticate_header()` method is not overridden, the authentication sch
 
 The following example will authenticate any incoming request as the user given by the username in a custom request header named 'X_USERNAME'.
 
+	from django.contrib.auth.models import User
+    from rest_framework import authentication
+    from rest_framework import exceptions
+
     class ExampleAuthentication(authentication.BaseAuthentication):
         def authenticate(self, request):
             username = request.META.get('X_USERNAME')