[PyQt] upgrading questions

[Matthew Ngaha]

Hey i use PyQt 4.9.4 and Qt 4.8.2. I was aware that Qt5 has been out
but i was waiting for PyQt5. I understand with Qt5/PyQt5 some classes
have changed but there are no docs or class reference i have seen for
it:

http://pyqt.sourceforge.net/Docs/PyQt4/index.html

i just want to ask are there any suprises i should look out for, or
will changes be easy to handle if i download PyQt5? I also noticed
some versions of PyQt 4 could be downloaded with a Qt5 version. Can
anyone explain this? Would this have had the new Qt with the newer
classes while still being PyQt4?