better Python IDE? Mimics Maya's script editor?

[warpcat]

I've been scripting in Maya, via mel for years now.  Recently learning
to Python, love it.  Thing that's driving me nuts it the IDE.  I'm
using PythonWin right now and trying to find something better, mainly
with this functionality:

In Maya's mel script editor window, it's split into two sections.
Bottom window you can enter commands (where your script lives), top
window gives results.  The thing I'm really used to is highlighting X#
of lines in the bottom window (little snippits from my script), and
executing that selection, with instant feedback of the results on top.
This really speeds my workflow.
It seems completely missing (so far) in Python's IDE.  I have to copy
and paste from a script to the ide window to execute and see the
results, or I have to make a bunch of "buffer scripts" with just the
code snippetsI want to test in.  Seems *really* clunky.

Does anyone know of a scripting enviroment for Python that mimics what
Maya's script editor has?  Much appreciated.