[pygame] tween engines in pygame?

[Timothee Groleau <tg@xxxxxxxxxxxxxxxxxxx>]

Hello all!

Newcomer here, I just started using both python and pyGame a few days ago, 
please bear with me. 

I'm trying to make a math flashcard program for my kids (following the Doman 
method). I can already generate my cards so that's fine but I'm not sure how 
to handle the next steps: improving drawing quality and handling motion.

Firstly, I'm drawing dots using pygame.draw.ellipse, is there any way to 
draw antialiased ellipses in pygame?

Secondly, to represent cards as almost physical cards, I want to animate them 
in and out of the screen. I come from the Actionscript world where I am used 
to tween engines. With these engines, I can let a property of a movieclip (x, 
y, width, etc.) change over time, and specify how the change occurs using 
pluggable easing methods (see. 
http://www.robertpenner.com/easing/easing_demo.html for example). Is there 
such a thing in pygame, and/or it is called something else? I can code some 
animation by hand, but I figured such animation engines must already exist.

Many thanks in advance!
Tim.