create emailer version 1

env/Lib/site-packages/django/contrib/sessions/exceptions.py

@@ -0,0 +1,19 @@
+from django.core.exceptions import BadRequest, SuspiciousOperation
+
+
+class InvalidSessionKey(SuspiciousOperation):
+    """Invalid characters in session key"""
+
+    pass
+
+
+class SuspiciousSession(SuspiciousOperation):
+    """The session may be tampered with"""
+
+    pass
+
+
+class SessionInterrupted(BadRequest):
+    """The session was interrupted."""
+
+    pass