How To write classifier in python without using sklearn

Question

I want to write a code which has self.data which consist binary attributes such as

self.data=[1, 0, 1, 0, 0, 1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,