diff -r 000000000000 -r 0d40e90630ef web/lib/django/core/exceptions.py
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/web/lib/django/core/exceptions.py	Wed Jan 20 00:34:04 2010 +0100
@@ -0,0 +1,37 @@
+"Global Django exceptions"
+
+class ObjectDoesNotExist(Exception):
+    "The requested object does not exist"
+    silent_variable_failure = True
+
+class MultipleObjectsReturned(Exception):
+    "The query returned multiple objects when only one was expected."
+    pass
+
+class SuspiciousOperation(Exception):
+    "The user did something suspicious"
+    pass
+
+class PermissionDenied(Exception):
+    "The user did not have permission to do that"
+    pass
+
+class ViewDoesNotExist(Exception):
+    "The requested view does not exist"
+    pass
+
+class MiddlewareNotUsed(Exception):
+    "This middleware is not used in this server configuration"
+    pass
+
+class ImproperlyConfigured(Exception):
+    "Django is somehow improperly configured"
+    pass
+
+class FieldError(Exception):
+    """Some kind of problem with a model field."""
+    pass
+
+class ValidationError(Exception):
+    """An error while validating data."""
+    pass