tests: Add test to print full KeyError exc from failed dict lookup.

dpgeorge · dpgeorge · commit 6caca3259f4e · 2016-10-17T12:01:18.000+11:00
diff --git a/tests/basics/dict1.py b/tests/basics/dict1.py
@@ -26,8 +26,8 @@
 # value not found
 try:
     {}[0]
-except KeyError:
-    print('KeyError')
+except KeyError as er:
+    print('KeyError', er, repr(er), er.args)
 
 # unsupported unary op
 try:
