Get key by value in dictionary

Posted By: Anonymous

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 backwards.

Solution

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)

Answered By: Anonymous

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