有向图的实现

arr = [[0] * 6 for row in range(6)]  # 声明矩阵arr

data = [[1, 2], [2, 1], [2, 3], [2, 4], [4, 3], [4, 1]]  # 图各边的起点值和终点值
for i in range(6):  # 读取图的数据
    # print(data[0])
    for j in range(6):  # 填入arr矩阵
        tmpi = data[i][0]  # tmpi为起始顶点
        tmpj = data[i][1]  # tmpj为终止顶点
        arr[tmpi][tmpj] = 1  # 有边的点填入1

print('有向图矩阵：')
for i in range(1, 6):
    for j in range(1, 6):
        print('[%d] ' % arr[i][j], end='')  # 打印矩阵内容
    print()