Is there somewhere an index of Py3k-only libraries?
Question: I'm curious if there are important libraries that support only Python 3, since
it appears that many libraries that do support it, also happen to support
Python 2.


Answer: No, there is no such index, but you could create one from the classifier data
on PyPI.

You could make a list of all packages that has "Programming Language :: Python
:: 3" or Programming Language :: Python :: 3.0" or "Programming Language ::
Python 3.1", but none of the Python 2 classifiers.

[http://pypi.python.org/pypi?:action=browse&c=214](http://pypi.python.org/pypi?:action=browse&c=214)

Possibly the XML interface can be useful:

<http://wiki.python.org/moin/PyPiXmlRpc>

