Python: If (user_input) in dictionary

Question

Having an issue with checking if user input is in a dictionary.

Basics of program is there's a shop inventory. The items are stored in a dictionary with corresponding values e.g. {'kettle': 3,.....}

Then I want user to write what they want. So if the user has entered 'kettle' I want to remove the item from the shop inventory and put in user inventory.

The main problem right now is just getting an if statement together. This is what I'm trying:

user_choice = input('What would you like to buy? ')
if user_choice in shop_inventory:
    print('Complete')
else:
    print('Fail')

How can I get the program to print "Complete"?

What is wrong with this code? If the dictionary contains 'kettle', and the user inputs that value, this will print 'Complete'. — Daniel Roseman, Jul 25 '17 at 13:40
Under py2 you'll have to use `raw_input`, not `input` as `input` evaluates the inputted data as python code. So you'll have to enter `'kettle'` with single quotes. — MatsLindh, Jul 25 '17 at 13:46

score -1 · Answer 1 · answered Jul 25 '17 at 14:33

You can use pop() to remove the item from the shop_inventory.

shop_inventory =  {'kettle': 3}
user_choice = input('What would you like to buy? ')
if user_choice in shop_inventory:
    shop_inventory.pop(user_choice)
    print(shop_inventory)
    print('Complete')
else:
    print('Fail')

BrutalGames · Answer 2 · 2018-03-02T13:16:43.637

-4

Instead of input(), use raw_input:

user_choice = raw_input('What would you like to buy? ')
if user_choice in shop_inventory:
    print('Complete')
else:
    print('Fail')

Explanation: In Python 2, raw_input() returns a string, and input() tries to run the input as a Python expression.

In Python 3 there is only raw_input(). It was renamed in input().

As statet here

edited Mar 02 '18 at 13:16

answered Jul 25 '17 at 13:45

BrutalGames

1
7

What's a high comma? – Kevin Jul 25 '17 at 13:48
quotes. Edited it.. @Kevin – BrutalGames Jul 25 '17 at 13:52
@Kevin I edited it. Could you please remove your downvote? – BrutalGames May 25 '18 at 11:10
1

There's nothing to remove, because I never downvoted you to begin with :-) – Kevin May 25 '18 at 11:42
@Kevin I did not want to be mean, but I got punished for answers I wrote last year and the only way to become active again is to remove the downvotes. Maybe StackOverflow has no space for change.. – BrutalGames May 25 '18 at 11:55

Python: If (user_input) in dictionary

2 Answers2