Forking PyPI package

[Wiktor]

Hello.

  There's script pwdhash https://pypi.python.org/pypi/pwdhash.py/0.1.1,
which I always* wanted to port to Python 3. (* - well, i.e. 6 months ;-))
  I'm using this hashing algorithm quite often for years in my browser
(Opera plugin), so I thought that it would be cool to have it as python
script.

  It took me some time to make it work under Python 3, because I knew
nothing about str <-> bytes encoding, and this was biggest issue why
original script wasn't Py3 compatible. So now my version works, it even
supports Unicode characters (original JS script does that, but pwdhash.py
script doesn't), and now I'm planning to do simple GUI version, because
copying from console isn't very comfortable (and I couldn't find good [os
and other packages independent] solution to copy string to clipboard. Best
answer from here http://goo.gl/8V9Ba6 isn't working).
  So, my point is, I think maybe it would be useful also to others.

  I'm newbie not only to Python, but to programming in general, so I don't
know, what is best practice in OS programming community. How forking works.
How py2->py3 porting (by 3rd person) is realized in Pythonians community.
Can you suggest me something? I see few scenarios:

1) I'm trying to contact with original script's author, and send him my
propositions of changes in code. (Oh, one more thing: my code isn't
backward compatible, and I don't know Py2 that much to include all those
try/except, so it could be Py2+Py3 compatible). He decides, if he wants to
release it as Py3 only version, or combine it with his script and release
Py2+Py3 common version.

2) I'm not contacting with him, and I'm forking his project on GitHub
   a) under the same name? - probably bad idea
   b) under new name (e.g. py3pwdhash)? 
Of course all credits about original author stay in code / setup.py.

2.1) After forking on GitHub, I'm creating new package on PyPI
   a) under old name, but different version number, and new description?
   b) under new name, to not confuse users?
   
   
  So, what should I do?
  I know, that maybe I shouldn't touch that script in first place and just
mail to author "Hey, would you please port it to Py3?", but I also treated
it as programming exercise, and I didn't think about consequences. ;-) 

TIA
-- 
Best regards,     Wiktor Matuszewski
'py{}@wu{}em.pl'.format('wkm', 'ka')