Как работает самый внутренний цикл в случае, если матрица треугольного нечеткого числа? Размеры a и b должны быть одинаковыми?

Question

def cal(a, b, k):
""" a is the dictionary with the linguistic variables 
    for the criteria weights (or the linguistic 
    variables for the ratings), b is the matrix with 
    the criteria weights (or the ratings), and k is 
    the number of the decision makers. The output is 
    the fuzzy decision matrix or the fuzzy weights 
    of the criteria 
    """
    f = []
    for i in range(len(b)):
        c = []
        for z in range(3):
            x = 0
            for j in range (k):
                x = x + a[b[i][j]][z]
            c.append(round(x / k, 3))
        f.append(c)
    return asarray(f)