Initial commit of Python queries and QL libraries.

python/ql/src/external/SimilarFunction.ql

@@ -0,0 +1,35 @@
+/**
+ * @name Similar function
+ * @description There is another function that is very similar this one. Extract the common code to a common function to improve sharing.
+ * @kind problem
+ * @tags testability
+ *       maintainability
+ *       useless-code
+ *       duplicate-code
+ *       statistical
+ *       non-attributable
+ * @problem.severity recommendation
+ * @sub-severity low
+ * @precision very-high
+ * @id py/similar-function
+ */
+import python
+import CodeDuplication
+
+predicate relevant(Function m) {
+    m.getMetrics().getNumberOfLinesOfCode() > 10
+}
+
+from Function m, Function other, string message, int percent
+where similarScopes(m, other, percent, message) and
+    relevant(m) and
+    percent > 95.0 and
+    not duplicateScopes(m, other, _, _) and
+    not duplicateScopes(m.getEnclosingModule(), other.getEnclosingModule(), _, _) and
+    not duplicateScopes(m.getScope(), other.getScope(), _, _)
+select m, message,
+   other,
+   other.getName()
+
+
+