CODEWITHSUNDEEP
pythonfunctiondictionary
Onl1X
Onl1X

Reputation: 31

Is there a function that can get values and keys from a dictionary

I want to create a function that returns the key if the user entered the value and the value if the user entered the key

I wrote this code, but is there a way to do this using dictionary?

def select(word):
    if word == 'Hello':
        return 'Hola'
    elif word == 'Hola':
        return 'Hello'

Upvotes: 0

Views: 181

Answers (2)

Mostafizur Rahman
Mostafizur Rahman

Reputation: 241

def get_key_value(kv, my_dict): # kv stands for key/value, since you don't know if it's key or value.

    # tries to get a value from the dictionary using the kv key.
    # if kv really is a key, my_dict.get(kv) will return the value, otherwise it will return None.
    # so, then we know kv isn't a key in the dictionary.
    if my_dict.get(kv):
        return my_dict.get(kv)

    # so, maybe kv is a value.
    # if kv is in my_dict.values() we then find what's its key using loop.
    elif kv in my_dict.values():
        for item in my_dict.items():
            if item[1] == kv:
                return item[0] # item[0] is the key for the value kv.

Upvotes: 0

Doyousketch2
Doyousketch2

Reputation: 2147

Just fill your dictionary with lowercase terms. It will return a capitalized word if you use one.

#! /usr/bin/env python3
dictionary = { 'hello':'hola', 'one':'uno', 'two': 'dos' }

def select( word ):
    lowercase = word .lower()  ##  just test for lowercase values, easier
    caps = word[0] .isupper()  ##  check if first letter caliptalized

    for English, Spanish in dictionary .items():
        if lowercase == English:
            if caps:  return Spanish[0] .upper() +Spanish[1:]  ##  Hola
            else:  return Spanish                              ##  hola

        elif lowercase == Spanish:
            if caps:  return English[0] .upper() +English[1:]  ##  Hello
            else:  return English                              ##  hello

print( select( 'Hola' ) )

Hello

Upvotes: 1

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