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Is there somewhere only an index of Py3k libraries?

I am curious if there are important libraries that only support Python 3, since it seems that many libraries that support it also support Python 2.

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Appears no , so I wrote this ( with some help ):

#!/usr/bin/env python3 import xmlrpc.client # PyPI classifiers for all Python 3 versions PY3 = [ "Programming Language :: Python :: 3", "Programming Language :: Python :: 3.0", "Programming Language :: Python :: 3.1", "Programming Language :: Python :: 3.2", "Programming Language :: Python :: 3.3", "Programming Language :: Python :: 3.4", ] # PyPI classifiers for all Python 2 versions PY2 = [ "Programming Language :: Python :: 2", "Programming Language :: Python :: 2.7", "Programming Language :: Python :: 2.6", "Programming Language :: Python :: 2.5", "Programming Language :: Python :: 2.4", "Programming Language :: Python :: 2.3", ] def main(): client = xmlrpc.client.ServerProxy('http://pypi.python.org/pypi') # name[0] is package name # name[1] is package version py3names = [ name[0] for classifier in PY3 for name in client.browse([classifier]) ] py2names = [ name[0] for classifier in PY2 for name in client.browse([classifier]) ] py3only = [name for name in py3names if name not in py2names] template = "Python3-only packages: {} (of {})" print(template.format(len(py3only), len(set(py2names + py3names)))) if __name__ == "__main__": main()
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No, there is no such index, but you can create it from the classifier data in PyPI.

You can list all packages that have "Programming Language :: Python :: 3" or Programming Language :: Python :: 3.0 "or" Programming Language :: Python 3.1 ", but not one of the Python 2 classifiers.

http://pypi.python.org/pypi?:action=browse&c=214

Perhaps the XML interface might be useful:

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

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PyPI has the Classifier Programming Language :: Python :: 3 :: Only , which only Python 3 packages should use. However, not all Python 3 packages were configured with it.

You can use this classifier to filter packages on the PyPI website: https://pypi.org/search/?c=Programming+Language+%3A%3A+Python+%3A%3A+3+%3A%3A+Only

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