Initial commit of Python queries and QL libraries.

python/ql/src/Classes/SlotsInOldStyleClass.py

@@ -0,0 +1,20 @@
+class Point:
+
+    __slots__ = [ '_x', '_y' ] # Incorrect: 'Point' is an old-style class.
+                               # No slots are created.
+                               # Instances of Point have an attribute dictionary.
+
+    def __init__(self, x, y):
+        self._x = x
+        self._y = y
+
+
+class Point2(object):
+
+    __slots__ = [ '_x', '_y' ] # Correct: 'Point2' is an new-style class
+                               # Two slots '_x' and '_y' are created.
+                               # Instances of Point2 have no attribute dictionary.
+
+    def __init__(self, x, y):
+        self._x = x
+        self._y = y