n1 = [[1, 2, 3], [4, 5, 6]]
n2 = [[2, 3, 4], [5, 6, 7]]
matriz_mult(n1, n2) => False

n1 = [[1], [2], [3]]
n2 = [[1, 2, 3]]
matriz_mult(n1, n2) => True

n1 = [
  [1, 2, 3],
  [4, 5, 6]
]

n1_cols = len(n1[0])

n2_rows = len(n2)

def matriz_mult(n1, n2):
    n1_cols = len(n1[0])
    n2_rows = len(n2)
    return (n1_cols == n2_rows)

n1 = [[1, 2, 3], [4, 5, 6]]
n2 = [[2, 3, 4], [5, 6, 7]]

import numpy as np

def mult_array(n1, n2):
    m1 = np.array(n1)
    m2 = np.array(n2)
    try:
        dot(m1,m2)
        success = True
    except:
        success = False
return success

print (mult_array(n1,n2))

n3 = [[5,6,7,8][1,2,3],[9,8,7]]
print (mult_array(n1,n3)