使用元组时，“int”类型的参数不可iterable

Question

当我运行我的程序时，我得到了这个错误，我不知道为什么。错误发生在if prt in migration_p[j][0] and dst in migration_p[j][1]行上

migration_p = [(1, 3), (2, 4), (3, 3)]
link = {(1, 2): 200, (1, 3): 50, (2, 3): 100, (1, 4): 300, (2, 4): 100, (3, 4): 50}
source_servers = {1: [1, 2, 3], 2: [1, 2, 3]}
partition = {1: 200, 2: 200, 3: 500}


def time_qi(dst, prt):
    global size, bandwidth, min_time, source

    tqi_rsrc = []
    indexes = []
    for i in source_servers.keys():
        if (i, dst) in link.keys():
            bandwidth = link[i, dst]
        for j in range(len(migration_p)):
            if prt in migration_p[j][0] and dst in migration_p[j][1]:
                size = partition[prt]
                tqi_rsrc.append(bandwidth / size)
                indexes.append(i)

    min_time = min(tqi_rsrc)
    index = np.argmin(tqi_rsrc)
    source = indexes[index]
    # print(source)

    return min_time, source

print(time_qi(3, 1)[0])

Answer 1

prt和migration_p[j][0]都是整数。您必须使用==而不是in：

if prt == migration_p[j][0]

in用于检查iterable对象中是否存在值。如果要使用in，必须执行以下操作：

 if prt in migration_p[j]

但请注意，这也可以匹配元组中的其他值。你知道吗