Find a value from a dictionary in python by taking a key from user input

Question

I have a dictionary. How can I get the value by taking the key from user?

d = {'a': '1', 'b': '2', 'c':'3'}

If the user enters a I wanted to print value '1'.

Possible duplicate of [How to test multiple variables against a value?](https://stackoverflow.com/questions/15112125/how-to-test-multiple-variables-against-a-value) — l'L'l, Apr 03 '19 at 00:34
What have you tried yourself? Do you know how to get user input? Do you know how to use a dictionary? — Loocid, Apr 03 '19 at 00:34
yes I have tried it but I could not figure out how to search for the key and get the value — Mikias Hundie, Apr 03 '19 at 00:38
@MikiasHundie You don't "search" for a key; Python does. You should always read the documentation or follow a tutorial first. — Selcuk, Apr 03 '19 at 00:55

score 3 · Accepted Answer · answered Apr 03 '19 at 00:56

3

This will do for you:

print(p["a"])

This prints the number for "a" in the dictionary.

For your program:

d = str(input("Enter what you want: "))
p  = {'a': '1', 'b': '2', 'c':'3'}
print(p[d])

If you enter a, then you get 1 as output.

Hope this Helps!!!!

answered Apr 03 '19 at 00:56

1

Also, here is a reference: https://www.w3schools.com/python/python_dictionaries.asp – Apr 03 '19 at 00:57
Just asking, what is this for? – Apr 03 '19 at 03:23

score 1 · Answer 2 · edited Apr 19 '21 at 21:15

1

user = input('enter a letter')
d = {'a': '1', 'b': '2', 'c':'3'}
for i in user:
    print(d[I])

use this method if your string consist of more then a single character

edited Apr 19 '21 at 21:15

joanis

answered Apr 03 '19 at 00:57

Kevin Mukuna

score 1 · Answer 3 · answered Apr 03 '19 at 00:57

Define your dictionary:

data = {'a': '1', 'b': '2', 'c':'3'}

Ask the user for the key using input():

key = input('Enter the key: ')

If the key is in the dictionary, print the value, otherwise print an error message:

if key in data:
    print('The value is:', data[key])
else:
    print('That key is not in the dictionary.')

3 Answers3