The information is still there, just in a different output line (i.e. http://hg.python.org/cpython/file/c7b16e2be71a/Lib/importlib/_bootstrap.py#l735 outputs the same info, just on its own line). I couldn't keep the old format as the code has been shifted around enough compared to how import.c was structured that reproducing the same output would have required a code refactor and contortion that wasn't worth it. I did my best to make sure no useful data was left out (and actually there is more since the loader is now also stated so you always have that info instead of only what Python's included loaders provide).