Let's see if this fixes the latest build error.

gen/python_api_gen_mpy.py

@@ -7,6 +7,8 @@
 # - Implement inheritance instead of embed base methods (how? seems it's not supported, see https://github.com/micropython/micropython/issues/1159)
 # - When converting mp to ptr (and vice versa), verify that types are compatible. Now all pointers are casted to void*.
 
+from __future__ import print_function
+
 import collections
 import copy
 import functools