Multiplication of matrices stored in lists

Question

I am struggling to multiply lists as matrices in Python.

I have two lists (weights and returns) and I need to multiply them as: weights*TRANSPOSE(returns).

Answer 1

How are Weights and Return defined in your code? You might be able to do the following:

#This sums the entries
matrixProduct = 0
for i in range(len(Weights)):
    matrixProduct+= Weights[i]*Return[i]

#In case you meant to keep products of individual pairs of matrix entries (not sure from your notation):
matrixProduct = []
for i in range(len(Weights)):
    matrixProduct.append(Weights[i]*Return[i])