通过字典中的值获取键值 [英] Get key by value in dictionary

问题描述

我做了一个函数，它将在字典中查找年龄并显示匹配的名称：

I made a function which will look up ages in dictionary and show the matching name:

list = {'george':16,'amber':19}
search_age = raw_input("Provide age")
for age in list.values():
    if age == search_age:
        name = list[age]
        print name

我知道如何比较找到我的年龄只是不知道如何显示这个人的名字。另外，由于第5行，我得到一个 KeyError 。我知道这是不正确的，但我无法确定使其向后搜索。

I know how to compare and find the age I just don't know how to show the name of the person. Additionally, I am getting a KeyError because of line 5. I know it's not correct but I can't figure out to make it search backwards.

推荐答案

没有。 dict 不是以这种方式使用。

There is none. dict is not intended to be used this way.

for name, age in list.iteritems():
    if age == search_age:
        print name

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