Initial commit of Python queries and QL libraries.

python/ql/src/Exceptions/NotImplementedIsNotAnException.ql

@@ -0,0 +1,19 @@
+/**
+ * @name NotImplemented is not an Exception
+ * @description Using 'NotImplemented' as an exception will result in a type error.
+ * @kind problem
+ * @problem.severity warning
+ * @sub-severity high
+ * @precision very-high
+ * @id py/raise-not-implemented
+ * @tags reliability
+ *       maintainability
+ */
+
+import python
+import Exceptions.NotImplemented
+
+from Expr notimpl
+where use_of_not_implemented_in_raise(_, notimpl)
+
+select notimpl, "NotImplemented is not an Exception. Did you mean NotImplementedError?"