Reference no: EM132211154

Question :

Write a program (PYTHON) that allows the user to add, delete and organize the items in a list.

Your program will provide the following options:

Append: adds an items, input by the user, at the end of the list.

Delete: removes an item indicated by the user from the list.

Move up: moves an item indicated by the user, to the previous position in the list.

Move Down: moves an item indicated by the user to the next position in the list.

Move Top: moves an item indicated by the user to the the first spot in the list.

Move Bottom: moves an item indicated by the user to the last position in the list.

Swap: swaps two items indicated by the user in the list.

List all: display the items in the list; one item per line.

Quit: allows the user to end the program.

Your program shall show appropriate error messages when trying to move, swap, or delete items not found in the list.

You program shall also properly handle invalid actions, like trying to move up the first item in the list, or trying to move down the last item in the list.

In order to get you started, download the file list_maintainer_base.py which you can find at the bottom of this page.

Here is a sample run. Let's assume we already added the following items (in this order): cake, cookies, ice cream.

Adding "donuts"

List Maintainer 3000 Menu: [A]dd item to the list, [R]emove item from list, [U] move an item up, [D] move an item down, [T] move item to the top, [B] move item to the bottom. [L]ist all items, [Q]uit program, [S]wap two items Enter an option: A [Add Item] Enter item: donuts ...Item added.
Listing all items

List Maintainer 3000 Menu: [A]dd item to the list, [R]emove item from list, [U] move an item up, [D] move an item down, [T] move item to the top, [B] move item to the bottom. [L]ist all items, [Q]uit program, [S]wap two items ?Enter an option: L [List All] 01 cake 02 cookies 03 ice cream 04 donuts
here is the code for the list:

def add_item(alist):
print("[Add Item]")
# Read a string from the user
# Add that string to the end of the list

def show_menu():
print('''
List Maintainer 3000
Menu: [A]dd item to the list, [R]emove item from list,
[U] move an item up, [D] move an item down,
[T] move item to the top, [B] move item to the bottom.
[L]ist all items, [Q]uit program,
[S]wap two items
''')

def read_option():
option = input("Enter an option: ").upper()
while option not in "ARUDTBLSQ":
print("Error: Invalid option. ")
option = input("Enter an option: ").upper()
return option

def main():
the_list = [] ##<--list to store user items

show_menu()
option = read_option()
while option != 'Q':
if option == 'A':
add_item(the_list)

elif option == 'R':
print("...remove item from list")

elif option == 'U':
print("...move item up")

elif option == 'D':
print("...move item down")

elif option == 'T':
print("...move item to the top")

elif option == 'B':
print("...move item to the bottom")

elif option == 'L':
print("...list all items")

elif option == 'S':
print("...swap two items")

else:
print("Bye!")

show_menu()
option = read_option()

main()