Read flat list into multidimensional array/matrix in python

Question

I have a list of numbers that represent the flattened output of a matrix or array produced by another program, I know the dimensions of the original array and want to read t

Answer 1

Without Numpy we can do as below as well..

l1 = [1,2,3,4,5,6,7,8,9]

def convintomatrix(x):

    sqrt = int(len(x) ** 0.5)
    matrix = []
    while x != []:
        matrix.append(x[:sqrt])
        x = x[sqrt:]
    return matrix

print (convintomatrix(l1))