add trickyscope.py

trickyscope.py

@@ -0,0 +1,9 @@
+from __future__ import print_function
+
+class TrickyScope:
+    a = 1
+    b = [a for i in range(1)]
+
+# Does not work with Python 3:
+print(type(TrickyScope.b))
+assert TrickyScope.b == [1]