Most Python programmers only use a handful of significant third party libs. I use fewer than a dozen. What is more significant is WSGI, which still has not been finalized for Python 3. There are two competing, unimplemented PEPS: 444 and 3333.
I have also heard some comments about the Python 3 standard library leaving some things to be desired. Perhaps someone more knowledgeable can elaborate.
for web (framework). Google App Engine still depends on Python 2, Django has some hesitates for the Python 3 port[1], the thread has some discuss about Python 3.2, peps 333(3) too.
and have a Python 3 version itself is not the same thing it can be put into production as it's tried-and-true Python 2 version.
I have also heard some comments about the Python 3 standard library leaving some things to be desired. Perhaps someone more knowledgeable can elaborate.