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Python exercise
Shopping list
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# Shopping list program
# -------------------------
# Subprograms
# -------------------------
def add_item():
new_item = input("Enter the item to add to the list: ")
file = open("shopping.txt", "a")
new_item = new_item + "\n"
file.write(new_item)
file.close()
def output_items():
try:
file = open("shopping.txt", "r")
except FileNotFoundError:
file = open("shopping.txt", "w")
file.close()
else:
print("-----------------------------")
for item in file:
item = item.strip()
print(item)
file.close()
print("-----------------------------")
def sort_items():
try:
file = open("shopping.txt", "r")
except FileNotFoundError:
file = open("shopping.txt", "w")
file.close()
else:
item_list = []
for item in file:
item = item.strip()
item_list.append(item)
file.close()
item_list.sort()
file = open("shopping.txt", "w")
for item in item_list:
item = item + "\n"
file.write(item)
file.close()
def menu():
choice = ""
while choice != "4":
print("1. Add item")
print("2. Output shopping list")
print("3. Sort list")
print("4. Quit")
while choice not in ["1", "2", "3", "4"]:
choice = input("Enter choice: ")
match choice:
case "1":
add_item()
choice = ""
case "2":
output_items()
choice = ""
case "3":
sort_items()
choice = ""
# -------------------------
# Main program
# -------------------------
menu()