在字典中按值获取键 [英] Get key by value in dictionary

问题描述

我做了一个函数，它会在 Dictionary 中查找年龄并显示匹配的名字:

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

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

我知道如何比较并找到年龄我只是不知道如何显示此人的姓名.此外，由于第 5 行，我收到了 KeyError.我知道它不正确，但我不知道如何让它向后搜索.

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 how to make it search backwards.

推荐答案

没有.dict 不打算以这种方式使用.

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

dictionary = {'george': 16, 'amber': 19}
search_age = input("Provide age")
for name, age in dictionary.items():  # for name, age in dictionary.iteritems():  (for Python 2.x)
    if age == search_age:
        print(name)

这篇关于在字典中按值获取键的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！