如何从python字典中获取键和值
我的字典如下所示如何从python字典中获取键和值,python,dictionary,if-statement,key,key-value,Python,Dictionary,If Statement,Key,Key Value,我的字典如下所示 my_dict = {4: 8, 3: 11, 4: 10, 5: 10, 8: 5, 9: 5, 10: 10, 5: 2} 我试图找出当key==value以及迭代值成为键时如何获得排序列表。结果是 [2,5,4,8],[10]] 有什么想法吗?这对你有用吗: my_dict = {1: 3, 4: 2, 2: 6, 10: 10} loop_backs = set() new_dict = my_dict.copy() for k,v in my_dict.items
my_dict = {4: 8, 3: 11, 4: 10, 5: 10, 8: 5, 9: 5, 10: 10, 5: 2}
我试图找出当key==value
以及迭代值成为键时如何获得排序列表。结果是
[2,5,4,8],[10]]
有什么想法吗?这对你有用吗:
my_dict = {1: 3, 4: 2, 2: 6, 10: 10}
loop_backs = set()
new_dict = my_dict.copy()
for k,v in my_dict.items():
if k == v:
loop_backs |= {k}
del new_dict[k]
repeated = set(new_dict.values()).intersection(new_dict.keys()) | loop_backs
res = set()
for k,v in new_dict.items():
if (k in repeated) or (v in repeated):
res |= {k,v}
print(res, loop_backs)
{2,4,6}{10}
当值成为关键时,您能否详细说明一下
代码>?示例字典无效,因为它包含两个重复的键(即4
和5
)。此外,只有一项key==value(10:10
),因此预期结果没有任何意义。字典中不能有重复的键,my_dict
没有所有的键值对,请使用元组列表。请更正字典my_dict={4:8,3:11,6:10,7:10,8:5,9:5,10:10,5:2}。我需要得到这部分[2,5,4,8];这已经被倒排了,但是没有倒排,那么它就是[4,8,5,2],它来自键:值{4:8,8:5;5:2}{10:10}注释不用于扩展讨论;这段对话已经结束。