Question

我们如何使用get（）获取密钥而不是值？

namelist = {0:"Ace", 1: "King", 2:"Queen", 3:"Jack", 4:"10",5:"9"}

我想为女王获得2分。

Answer 1

生成如下的逆字典：

inverse_namelist = {v: k for k, v in namelist.items()}

然后你可以简单地将它用作字典，就像你获得密钥一样。

Answer 2

你可以试试这个

>>> namelist = {0:"Ace", 1: "King", 2:"Queen", 3:"Jack", 4:"10",5:"9"}
>>> for i in namelist:
...     if namelist.get(i) == "Queen":
...         print(i)
... 
2

注意 - 这并不意味着这样做，当你知道密钥而不是反之时，字典用于访问值。在您的情况下，最好拥有list数据结构，与namelist = ["Ace", "King", "Queen", "Jack", "10","9"}中一样，您可以Queen

访问namelist.index("Queen")

Answer 3

def getFromValue(dictionary, choice):
    for key, value in dictionary.items():
        if value == choice:
            return key

nameDict = {0:"Ace", 1: "King", 2:"Queen", 3:"Jack", 4:"10",5:"9"}

choice="Queen"

print getFromValue(nameDict, choice)

使用get（）从字典中提取密钥

3 个答案: