removing items from a list

 import os

 # make a list to hold items
 shopping_list = []

 def clear_screen():
      os.system("cls" if os.name == "nt" else "clear")


 def show_help():
     clear_screen()
     print("What should we pick up at the store?")
     print("""
 Enter 'DONE' to stop adding items.
 Enter 'HELP' for this help.
 Enter 'SHOW' to see your current list.
 Enter 'REMOVE' to delete an item from your list.
 """)


 def add_to_list(item):
     show_list()
     if len(shopping_list):
         position = input("Where should I add {}?\n"
                          "Press ENTER to add to the end of the list\n"
                          "> ".format(item))
     else:
         position = 0

     try:
         position = abs(int(position))
     except ValueError:
         position = None
     if position is not None:
         shopping_list.insert(position-1, item)
     else:
         shopping_list.append(new_item)

     show_list()    


 def show_list():
     clear_screen()
     print("Here's your list: ")

     index = 1
     for item in shopping_list:
         print("{}. {}".format(index, item))
         index += 1

     print("-"*10)


 def remove_from_list():
     show_list()
     what_to_remove = input("What would you like to remove?\n> ")
     try:
         shopping_list.remove(what_to_remove)
     except ValueError:
         pass
     show_list()


 show_help()

 while True:
    new_item = input("> ")

     if new_item.upper == 'DONE' or new_item.upper() == 'QUIT':
         break
     elif new_item.upper() == 'HELP':
         show_help()
         continue
     elif new_item.upper == 'SHOW':
         show_list()
         continue
     elif new_item.upper == 'REMOVE':
         remove_from_list()
     else:
         add_to_list(new_item)    

 show_list()