Which reactor should i use for qt4?

Question

I am using twisted and now i want to make some pretty ui using qt

Answer 1

You want to use Glen Tarbox's qt4reactor.

Answer 2

You need a qt4reactor, for example this one (but that's a sandbox and thus not good for production use -- tx @Glyph for clarifying this!).

As @Glyph says, the proper one to use is the one at launchpad.