如何访问多维Python字典的第二个键？

Question

我有下面的字典。我要提取某些索引的第二个键。例如，我尝试了list(results.keys())2，它给了我整行'DVMay2021，Journey3'的索引。但是，我只想要第二个键："Journey3“。

 DV[May2021, Journey1]: 0,
 DV[May2021, Journey2]:1,
 DV[May2021, Journey3]:1,
 DV[june2021, Journey1]:0,
 DV[june2021, Journey2]:2,
 DV[june2021, Journey3]:0,
 DV[july2021, Journey1]:3,
 DV[july2021, Journey2]:2,
 DV[july2021, journey3]:2,
 DV[aug2021, Journey1]:2

Answer 1

你可以试试这个

test_dict = {
 "DV[May2021, Journey1]":0,
 "DV[May2021, Journey2]":1,
 "DV[May2021, Journey3]":1,
 "DV[june2021, Journey1]":0,
 "DV[june2021, Journey2]":2,
 "DV[june2021, Journey3]":0,
 "DV[july2021, Journey1]":3,
 "DV[july2021, Journey2]":2,
 "DV[july2021, journey3]":2,
 "DV[aug2021, Journey1]":2
}
keys = list(test_dict)[2]
print(keys[keys.index("["):keys.index("]")].split()[1])

输出：

Journey3