經過字典中的值獲取鍵 - Get key by value in dictionary

問題：

I made a function which will look up ages in a Dictionary and show the matching name: 我作了一個函數，能夠在Dictionary查詢年齡並顯示匹配的名稱：

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. 我知道如何比較和查找年齡，但我不知道如何顯示此人的名字。 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，因爲第5行，我獲得了KeyError 。我知道這是不正確的，但我不知道如何使它向後搜索。

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解決方案：

參考一： https://stackoom.com/question/XfEA/經過字典中的值獲取鍵
參考二： https://oldbug.net/q/XfEA/Get-key-by-value-in-dictionary