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          


        

Answer 1

my_dict = {'A': 19, 'B': 28, 'carson': 28}
search_age = 28

take only one

name = next((name for name, age in my_dict.items() if age == search_age), None)
print(name)  # 'B'

get multiple data

name_list = [name for name, age in filter(lambda item: item[1] == search_age, my_dict.items())]
print(name_list)  # ['B', 'carson']