Question

working on a Python program, making a shopping list giving the user several options:to view the list, to add an item or to delete and an option to exit the program. It's not working at all. please help.

File Edit Format Run Options Window Help class shopping: det init (self, final list): self.final_list=1 det add_item(self, item): self.final list.append(item] print("The added temi " + str(item) + ".") det delete item(self, item): gelf.final list.remove(item) print (the deleted item is "+ste (item) +".") det print list (self): print ("The current liat 13 " + str(self.final list) + ".") det display_menu (shopping): print("Welcome to the shopping list!) printo print("Press 1 to see the current liat.") print (Press 2 to add an iter.) print (Peas 3 to delete an item.") print("Press 4 to exit the program.") print) choice input ("Enter your choice: ") 1t choice": print (1) shopping.print list) print display_menu (shopping) elet choice print item-input("Please add your item: print) shopping, add item(item) print) display_menu (shopping) elit choice="3": print() item=input("Please delete your items) print () shopping.delete_item(item) print() display_menu (shopping) elit choice 4": printo print("This is the end of the lis!) print) print("Please enter a valid option.") print) display_menu (Shopping)

Answer 1

SOLUTION

Before going to the code i have some tips for you.

• Please use CamelCase for python classes
• also instead of using so many blank "print()" statements you can just put a "\n" at the previous print statement.

Here is the code:

class Shopping:

#here the final_list parameter is not needed

def __init__(self):

self.final_list = []

def add_item(self, item):

self.final_list.append(item)

print("The added item is "+str(item)+" .")

def delete_item(self, item):

#I have changed this function

if item not in self.final_list:

print("The item to be removed does not exist.")

else:

self.final_list.remove(item)

print("The removed element is "+str(item)+" .")

def print_list(self):

print("The current list is $ "+str(self.final_list) + " .")

def display_menu(shopping):

print("Welcome to the shopping list \n")

print("press 1 to see the current list")

print("press 2 to add an item to current list")

print("press 3 to delete the current list")

print("press 4 to exit the program")

choice = input("Enter your choice : ")

if choice == "1":

print()

shopping.print_list()

print()

display_menu(shopping)

elif choice == "2":

print()

item = input("Please add your item : ")

print()

shopping.add_item(item)

print()

display_menu(shopping)

elif choice == "3":

print()

item = input("Enter the item you need to delete : ")

print()

shopping.delete_item(item)

print()

display_menu(shopping)

elif choice == "4":

#I have also changed this elif part

print("Exiting the program")

return

else:

print("Please enter a valid input.\n")

display_menu(shopping)

#Driver code to test the above class

if __name__ == "__main__":

shopping = Shopping()

display_menu(shopping)

___________________________________________________________________________________________________

Here is the output and image of the code:

Visual Studio Code 00:26 49% Shopping.py - C++ - Visual Studio Code File Edit Selection View Go Run Terminal Help o a 9 F. Shopping.py X Shopping.py >display_menu 1 class Shopping: 2 #here the final_list parameter is not needed 3 def init (self): 4 self.final_list = [] 5 6 def add_item(self, item): 7 self.final_list.append(item) 8 print("The added item is "+str(item)+" ,") 9 10 def delete_item(self, item): 11 #I have changed this function 12 if item not in self.final list: 13 print("The item to be removed does not exist.") 14 else: 15 self.final list.remove(item) 16 print("The removed element is "+str(item)+" ,") 17 18 def print_list(self): 19 print("The current list is $ "+str(self.final_list) + " .") 20 21 def display_menu(shopping): 22 print("Welcome to the shopping list \n") 23 print("press i to see the current list") 24 print("press 2 to add an item to current list") 25 print("press 3 to delete the current list") 26 print("press 4 to exit the program") 27 28 choice = input("Enter your choice : ") 29 30 if choice == "1": sos 31 print() channing print licto Python 3.7.5 64-bit Ⓡ0A0 Azure Pipelines schema changed. Restart VS Code to see the changes. In 53, Col 15 Spaces: 4 UTF-8 LF Python Q Go Live RC

Visual Studio Code 00:27 49% • Shopping.py - C++ - Visual Studio Code X File Edit Selection View GO Run Terminal Help * Shopping.py Shopping.py ... 32 shopping.print_list() 33 print() 34 display_menu(shopping) 35 elif choice == "2": 36 print() 37 item = input("Please add your item : ") 38 print() 39 shopping.add item(item) 40 print() 41 display_menu( shopping) 42 elif choice == "3": A 43 print() 44 item = input("Enter the item you need to delete : ") 45 print() 46 shopping.delete_item(item) 47 print() 48 display_menu( shopping) 49 50 elif choice == "4": 51 #I have also changed this elif part 52 print("Exiting the program") 53 return 54 55 else: 56 print("Please enter a valid input.\n") 57 display_menu(shopping) 58 59 #Driver code to test the above class 60 if name _main__": 61 shopping = Shopping sos 62 display_menu(shopping) Python 3.7.5 64-bit Ⓡ0A 0 1 Ln 61, Col 26 Spaces: 4 UTF-8 LF Python Q Go Live

• Shopping.py - C++ - Visual Studio Code File Edit Selection View GO Run Terminal Help PROBLEMS OUTPUT DEBUG CONSOLE TERMINAL 1: bash + amrit@amrit-Inspiron-15-3567 -/Projects/C++ $ python3 Shopping.py Welcome to the shopping list press 1 to see the current list press 2 to add an item to current list press 3 to delete the current list press 4 to exit the program Enter your choice : 1 The current list is $ [] . Welcome to the shopping list press 1 to see the current list press 2 to add an item to current list press 3 to delete the current list press 4 to exit the program Enter your choice : 2 Please add your item : apple The added item is apple . Welcome to the shopping list press i to see the current list press 2 to add an item to current list press 3 to delete the current list press 4 to exit the program Enter your choice : 2 Please add your item : 2 The added item is 2. Welcome to the shopping list press 1 to see the current list Python 3.7.5 64-bit AO Ln 61, Col 26 Spaces: 4 UTF-8 Python Go Live

Visual Studio Code 00:27 47 % • Shopping.py - C++ - Visual Studio Code File Edit Selection View Go Run Terminal Help PROBLEMS OUTPUT DEBUG CONSOLE TERMINAL 1: bash + х press 1 to see the current list press 2 to add an item to current list press 3 to delete the current list press 4 to exit the program Enter your choice : 2 Please add your item : orange The added item is orange . A Welcome to the shopping list press i to see the current list press 2 to add an item to current list press 3 to delete the current list press 4 to exit the program Enter your choice : 1 The current list is $ ['apple', '2', 'orange'] . Welcome to the shopping list press 1 to see the current list press 2 to add an item to current list press 3 to delete the current list press 4 to exit the program Enter your choice : 3 Enter the item you need to delete : 2 The removed element is 2. Welcome to the shopping list press 1 to see the current list press 2 to add an item to current list press 3 to delete the current list press 4 to exit the program Python 3.7.5 64-bit ⓇAO Ln 61, Col 26 Spaces: 4 UTF-8 LF Python Q Go Live

Enter your choice : 1 The current list is $ ['apple', 'orange'] . Welcome to the shopping list press 1 to see the current list press 2 to add an item to current list press 3 to delete the current list press 4 to exit the program Enter your choice : 4 Exiting the program amritamrit Inspiron 15.3567 /Projects ICH Ś

comment if any doubt,.