Moving objects smoothly

[flip321]

Of course:
Let's say I want to move an imported 3D-object from it's position to the center of the stage/screen whatever with the coordinates [0,0,0]. The skript works, but in order to make it look more realistic in a physical way, I want the beginning of the movement progress to start slower as well as the ending of the movement.
In other words I want the speed of the movement to increase in the beginning and decrease in the end, and NOT to have a constant movement speed over the whole time.

Here's a part of the script I'm using right now:

def show_moviepreviews():
moveToStage = vizact.moveTo([0, 0, 0],time=1)
movie_icon.addAction(moveToStage)

Thanks a lot,
Philipp