Python 3。在python x(x,y)?

I'm in the process of setting up a Matlab like environment so I downloaded the latest version of python(x,y) with all the modules that come with it and downloaded python 3.4.1. Does python(x,y) not run the latest version of python? I noticed because the python(x,y) shell doesn't auto calculate mathematical operations into floats which I read is a difference between python 2.x and 3.x. Do I just have to wait for a new release of (x,y) or am I missing something here?I'm in the process of setting up a Matlab like