Initial commit of Python queries and QL libraries.

python/ql/src/analysis/Definitions.ql

@@ -0,0 +1,17 @@
+/**
+ * @name Definitions
+ * @description Jump to definition helper query.
+ * @kind definitions
+ * @id py/jump-to-definition
+ */
+
+import python
+import DefinitionTracking
+
+
+from NiceLocationExpr use, Definition defn, string kind, string f, int l
+where defn = getUniqueDefinition(use) and kind = "Definition"
+and use.hasLocationInfo(f, l, _, _, _) and
+// Ignore if the definition is on the same line as the use
+not defn.getLocation().hasLocationInfo(f, l, _, _, _)
+select use, defn, kind