They can be found through autopep8 (W690) or python-modernize.
Variables manually renamed.
This is because Python 3 does not support tuple unpacking:
http://legacy.python.org/dev/peps/pep-3113/
They bring nothing of value (we never use import * anyway) and introduce
a maintenance burden.
The __all__ that I left might not be very useful either but at least
they are not a pain to maintain; they are also used by pyflakes in some
cases.