Implement support for __str__ and __repr__ special methods in classes.
diff --git a/py/qstrdefs.h b/py/qstrdefs.h
index 2678526..8f6cc11 100644
--- a/py/qstrdefs.h
+++ b/py/qstrdefs.h
@@ -21,6 +21,8 @@
 Q(__setitem__)
 Q(__add__)
 Q(__sub__)
+Q(__repr__)
+Q(__str__)
 
 Q(micropython)
 Q(byte_code)