3-dimensional plot in Python?

[questions?]

I want to make a 3d plot. x is a vector(discrete), y is also a
vector(discrete), for each pairwise x,y I have a value z(x,y)(it is not
a function, just discrete values for each pair of x,y)

I want to show them on a two dimensional plot by showing z(x,y) with
colors.

Thanks for any hint