datas = [
[0, 1, 2],
[0, 2, 6],
[0, 3, 4],
[1, 2, 3],
[2, 0, 7],
[2, 3, 1],
[3, 0, 5],
[3, 2, 12],
]
inf=999999999999999999999
n=4
graph = [[(lambda x: 0 if x[0] == x[1] else inf)([i, j]) for j in range(n)] for i in range(n)]
for u, v, c in datas:
graph[u][v] = c # 因为是有向图,边权只赋给graph[u][v]
#graph[v][u] = c # 如果是无向图,要加上这条。
想请问一下graph那里的 (lambda x: 0 if x[0] == x[1] else inf)([i, j]) 这个操作叫啥,感觉和平时的lambda函数不太一样呀,求解释
平常不都是前面一个函数名,然后调用这个函数吗,如下:
x = lambda a : a + 10
print(x(5))