How to make a banner system with a frequency of impressions?

Question

Django

I am looking for a way to implement the simplest system of advertising banners on the site, it is important to be able to specify the frequency of impressions. That is, he indicated the frequency of impressions to the banner (0.0 - 1.0) and somehow banners will be displayed on the page, taking into account the frequency.
Does anyone know a module or an approximate algorithm to do this myself?)

Answer 1

https://stackoverflow.com/questions/4113307/python...

Answer 2

https://docs.python.org/dev/library/random.html#ra... - specify weight