2D Graphics Libraries for python?

[Ken Seehof]

I'm looking for the right graphics library.  I've searched the web and found
thousands of libraries that don't quite do what I need.  Is there anything out
there that has the following features?

- Beziers
- Antialiasing (lines and beziers)
- Transparent bitmaps
- Portable (unix, linux, mac, windows)
- Can be painted in a wxPython window

If wxPython is not directly supported, perhaps some kind of hack would be
possible, such as passing the window handle to library specific code.

- Some image processing capabilities would be nice (adjust hue, color
saturation, drop shadow, scale with resampling, etc.).

Thanks,
Ken