ขั้นตอนการเขียนโค้ด · การคูณเมทริกซ์จำนวนเต็มแบบจำกัด

def matrix_product(left, right):
    left, right = [tuple(r) for r in left], [tuple(r) for r in right]
    widths = []
    for matrix in (left, right):
        width = len(matrix[0]) if matrix else 0
        if len(matrix) > 64 or width > 64 or any(len(r) != width for r in matrix):
            raise ValueError("matrix.shape")
        if any(type(v) is not int for r in matrix for v in r):
            raise ValueError("cell.integer")
        widths.append(width)
    if widths[0] != len(right):
        raise ValueError("matrix.incompatible")
    return [[sum(row[k] * right[k][j] for k in range(widths[0]))
             for j in range(widths[1])] for row in left]