如果输入字符串与键匹配，如何打印字典的元素？

Question

I have a dictionary where the keys are some strings and they hold string values. Now I want to write a code which takes input from the user and if the input matches with any of the keys, prints the value contained in the keys. How do I access the elements contained in the keys and print them?

Answer 1

dict['key']

where key is your input string. A dictionary works like an array except rather than numbers you can use a string to get to the data

Answer 2

You don't need to access keys in your dictionary, just print the value, using your user input as key:

if user_input in your_dictionary :
    print your_dictionary[user_input]
else :
    print user_input, 'is not found in the dictionary'

(you need if check to avoid throwing an Exception in case when your user input is not in your dictionary)

Answer 3

Your program should be something like this

a_dict = {'a': 100, 'b': 200, 'c': 300}
key = input('what key: ')

if key in a_dict:
    print('the value of key {} is {}'.format(key, a_dict[key]))

else:
    print('key {} is not in the dict'.format(key))

Answer 4

You can also get function of python dictionaries like this

my_dict = {1: 'One', 2:'Two', 3:'Three'}

my_key = input("Enter your key")

print my_dict.get(my_key,'Key not found')

See the examples here .