经过字典中的值获取键 - Get key by value in dictionary

问题：

I made a function which will look up ages in a Dictionary and show the matching name: 我作了一个函数，能够在Dictionary查询年龄并显示匹配的名称：

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

I know how to compare and find the age I just don't know how to show the name of the person. 我知道如何比较和查找年龄，但我不知道如何显示此人的名字。 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. 另外，因为第5行，我获得了KeyError 。我知道这是不正确的，但我不知道如何使它向后搜索。

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解决方案：

参考一： https://stackoom.com/question/XfEA/经过字典中的值获取键
参考二： https://oldbug.net/q/XfEA/Get-key-by-value-in-dictionary