Reasons to love Python

It lets you do twisted things like this:

waves = [[Clown, Clown, Clown],
[Clown, Tank, Bunny, Clown],
[Clown, Tank, Tank, Clown],
[Clown, Tank, Tank, Bunny],
[Tank, Tank, Tank, Clown],
where Clown, Tank and Bunny are the Types of the various enemies and later…
for enemy in waves[wave]:
enemy(xpos, ypos, 0, 0,
and it just figures it out and calls the constructor for the relevant type.