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

问题

Closed. This question needs to be more focused. It is not currently accepting answers.

---

Want to improve this question? Update the question so it focuses on one problem only by editing this post.

Closed 1 year ago.

Improve this 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'.

回答1:

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!!!!

回答2:

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.')

回答3:

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

来源：https://stackoverflow.com/questions/55485344/find-a-value-from-a-dictionary-in-python-by-taking-a-key-from-user-input