Initial commit of Python queries and QL libraries.

python/ql/src/Statements/AssertOnTuple.ql

@@ -0,0 +1,24 @@
+/**
+ * @name Asserting a tuple
+ * @description Using an assert statement to test a tuple provides no validity checking.
+ * @kind problem
+ * @tags reliability
+ *       maintainability
+ *       external/cwe/cwe-670
+ * @problem.severity error
+ * @sub-severity low
+ * @precision very-high
+ * @id py/asserts-tuple
+ */
+
+import python
+
+from Assert a, string b, string non
+where a.getTest() instanceof Tuple and
+			(if exists(((Tuple)a.getTest()).getAnElt()) then
+			    (b = "True" and non = "non-")
+       else
+          (b = "False" and non = "")
+      )
+select a, "Assertion of " + non + "empty tuple is always " + b + "."
+