self.weights = 2 * random.random((3, 1)) - 1

Question

plz I nid an explanation of this code

Answer 1

Your Code will not work. Did you mean:

(2 * random.randint (1, 3) - 1)

This will return a random odd Integer between 1 and 5.

Answer 2

numpy.random.random((a, b)) creates a (a, b) dimensional array and fills it with random values betweeen [0, 1) so it returns an array with numbers between [-1, 1)

Answer 3

I found the Codeline in one Lessons:

https://www.sololearn.com/learn/738/?ref=app

It is Part of the Numpy Lib and creates an Array of three random Numbers between -1 and 1.