CODEWITHSUNDEEP
pythonpython-2.7
bhamhawker
bhamhawker

Reputation: 95

How do I check raw_input against a list of strings?

Here's what I have at this point:

def checkPlayerCardInput(answer):
    while True:
        for x in range(len(player1Cards)):
            if answer.lower() == player1Cards[x]:
                return player1[x]

What I don't know is how to repeat the loop if the user misspells a word or enters something incorrect entirely?

In this scenario, player1Cards is equal to a list of 5 strings. I'm simply trying to match the answer (which is input previously by the user via raw_input) to one of those strings and return that answer (which, in this case, is the item from the player1 list that contains the rest of the data for the "card" returned).

If the answer is incorrect, I would like the loop to start with a fresh raw_input answer from the user.

Upvotes: 0

Views: 1240

Answers (3)

kirelagin
kirelagin

Reputation: 13626

To check that an item is contained in a list use in operator. Like this:

if answer.lower() in player1CArds:
    #...

Use a while loop to keep asking for raw_input until you're given a string found in the list.

Upvotes: 4

njzk2
njzk2

Reputation: 39406

The else keyword can be use in your case. Used in conjonction with for, the else clause is executed when the range was exhausted without exiting the loop (break or return) :

for x in range(len(player1Cards)):
        if answer.lower() == player1Cards[x]:
            return player1[x]
else:
    # Here, your user input matches nothing.

However, you can use the in keyword of list:

if answer.lower() in player1Cards:
    # equivalent to your for loop

Or the opposite, not in:

if answer.lower() not in player1Cards:
    # Typo, or the user inputed a non-existing card

Upvotes: 0

User
User

Reputation: 14873

Does this do what you want?

def checkPlayerCardInput(answer):
    while True:
        for x in range(len(player1Cards)):
            if answer.lower() == player1Cards[x]:
                return player1[x]
        answer = raw_input('incorrect answer!')

Upvotes: 0

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