Some help with Dictionaries

[bowlofred]

The dictionary itself doesn't have any features that allow you to search a key based on a value. All you can do is loop over every key/value and keep track of keys where the value meets your criteria. As the dictionary grows large, this operation will become more expensive.

a_dic = {
    "a" :   [":D", ":)"],
    "b" :   ["lol", "XD"],
    "c" :   ["lol", ">:"],
    "d" :   [":)", "XD"]
}

search_item = ":)"

match_keys = [k for k,v in a_dic.items() if search_item in v]
print(match_keys)

Output:
['a', 'd']