Experiment with using plpy from the package

python/crankshaft/crankshaft/poc/xyz.py

@@ -1,3 +1,5 @@
+import plpy
+
 def xyz():
-    # print "XYZ"
+    plpy.notice('XYZ...')
     return "xyz-result"

python/crankshaft/test/test_poc.py

@@ -2,6 +2,13 @@
 # -*- coding: utf-8 -*-
 
 import unittest
+
+class MockPlPy:
+    def notice(self, msg):
+        print msg
+
+import sys
+sys.modules['plpy'] = MockPlPy()
 import crankshaft
 
 class TestPoc(unittest.TestCase):