R. David Murray added the comment: Yes. Imagine you have a deployed application, and there happens to be an xx.py file that is masked by a package in it. You upgrade from pythonX.Y.Z to X.Y.Z+1, and your application is suddenly throwing an error. Yes it is easy to fix, but we prefer not to break things that way. Now, could we throw an error in Python 3.4? It could be discussed, at least. ---------- _______________________________________ Python tracker <report@bugs.python.org> <http://bugs.python.org/issue17108> _______________________________________