Generate random number outside of range in python

Question

I\'m currently working on a pygame game and I need to place objects randomly on the screen, except they cannot be within a designated rectangle. Is there an easy way to do this

Answer 1

1. Partition the box into a set of sub-boxes.
2. Among the valid sub-boxes, choose which one to place your point in with probability proportional to their areas
3. Pick a random point uniformly at random from within the chosen sub-box.

This will generate samples from the uniform probability distribution on the valid region, based on the chain rule of conditional probability.