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Python Python Basics All Together Now Branch and Loop

why does my if else statement not work?

why is

confirm = input("do you want to proced? Y/N    ")

in a loop even if one these perameters are met?

if confirm == "y":
    print("SOLD!")
    tickets_remaining -= number_of_tickets 
elif confirm == "n":
    sys.exit("thanks anyways {}!".format(name))

thanks in advance!

import sys

TICKET_PRICE = 10

tickets_remaining = 100

print("there are {} tickets left".format(tickets_remaining))

name = input("what is your name?    ")

number_of_tickets = int(input("how much tickets would you like, {}?    ".format(name)))

amount_due = number_of_tickets * 10
print("that would be ${}, {}.".format(amount_due, name))

print("are you sure you want to go through with this?    ")

confirm = input("do you want to proced? Y/N    ")
while confirm.lower != ("y", "n"):
    print("whoops! try again!")
    confirm = input("do you want to proced? Y/N    ")

if confirm == "y":
    print("SOLD!")
    tickets_remaining -= number_of_tickets 
elif confirm == "n":
    sys.exit("thanks anyways {}!".format(name))
    ```

2 Answers

Chris Freeman
MOD
Chris Freeman
Treehouse Moderator 67,622 Points

Hey Sabeen Azhar, there a a few problems with your while loop conditional

  • confirm.lower is a bound method. Without specifying the () parens to call the function, this is a reference to the executable itself.
  • comparing to a tuple ("y", "n") will only match another tuple of the same values.

You can use the in operator to see if something is "in" a container of values, such as a tuple:

while confirm.lower() not in ("y", "n"):

Post back if you need more help. Good luck!!

Thank you for the answer Chris Freeman, it worked perfectly!