Nick Coghlan added the comment:
This feature is unnecessary now that PEP 3147 has been adopted. The way it
works in 3.2+ is that orphaned bytecode files inside __pycache__ are always
ignored, while bytecode files that live directly in the source directories are
always imported.
This handles
New submission from Petri Lehtinen :
This has been discussed in python-ideas approx. two years ago:
http://mail.python.org/pipermail/python-ideas/2009-December/006635.html
It seems to me that having an opt-in command-line option, environment variable
and sys variable to disable loading orphane
