func_namewere renamed to
Currently six only provides compatibility methods for the second and the third of these seven attributes:
Apparently, some of the new names already work under CPython 2.x. But they aren't documented and some alternative implementations don't have them. For instance, PyPy 1.9 doesn't have
I suggest to add compatibility methods for the five other function attributes; or if there's a good reason I'm not aware of for not providing them, to explain it in the docs :)
I can fix this in the patched version of six shipped with Django (it already adds a few Django-specific compatibility functions), but since that problem isn't specific to Django, I'm filing this ticket here too.