Why is PyQt4 not available in the Python packaging index?

Well, I wrote a small application that uses PyQt4 and wants to distribute it. But the problem is that I have to ask users to manually install PyQt4, because this cannot be done with setuptools.

So, as for this , I wanted to ask if anyone knows why PyQt4 is not on PyPi?

Also, is there any other possible way to include PyQt4 in my setup.py so that users do not need to install it manually?

thank