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getting a promotion

These are the two discount modules: starbuzz.py
promotion.py
# Official Starbuzz Discount Module
# Copyright(c) Starbuzz Corporation
def discount(price):
# All Rights Reserved.
return 0.9 * price
# This function calculates a 5% discount on a price
def discount(price):
return 0.95 * price

You were asked to write a new version of coffee_pos.py that, after choosing an menu option,
will ask if the customer has a Starbuzz Discount Card. If the answer is “Y”, apply both the Starbuzz
and the promotion discount. Otherwise, just apply the promotion discount.
Here is the latest version of coffee_pos.py:

from transactions import *
from promotion import *

items = ["DONUT", "LATTE", "FILTER", "MUFFIN"]
prices = [1.50, 2.20, 1.80, 1.20]
running = True

while running:
option = 1
for choice in items:
print(str(option) + ". " + choice)
option = option + 1
print(str(option) + ". Quit")
choice = int(input("Choose an option: "))
if choice == option:
running = False
else:
credit_card = input("Credit card number: ")
new_price = discount(prices[choice - 1])
save_transaction(new_price, credit_card, items[choice - 1])

210 Chapter 6