Get key by value in dictionary

Question

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 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 backward. Select the correct answer from above options

Answer 1

You can use the below-mentioned code in Python 2.x this will print george which is the key in our dictionary:- mydict = {'george':16,'amber':19} print mydict.keys()[mydict.values().index(16)] If you are using Python 3.x you need to do as follows: mydict = {'george':16,'amber':19} print(list(mydict.keys())[list(mydict.values()).index(16)]) Basically what it does is, it separates the dictionary's values in a list, finds the position of the value you have, and gets the key at that position.