This question is for a program in python

Below is my program code for my contact manager. What I need help with is the following (to add to my code):

- If the program cant find the CSV file, it should display an appropriate message and create a new CSV file that doesnt contain any contact data.

- For the view and del commands, display an appropriate error message if the user enters an invalid integer or an invalid contact number.

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This is my code for my contact manager:

##my program code

import csv,os;

##definition name for the CSV file

FILENAME = "contacts.csv"

##definiton write function and write items to CSV file

def write_contacts(contacts): with open (FILENAME, "w", newline="") as file: writer = csv.writer(file) writer.writerows(contacts)

##definition read items from CSV file into a list

def read_contacts(): contacts = [] with open(FILENAME, newline="") as file: reader = csv.reader(file) for row in reader: contacts.append(row) return contacts

##definition list command

def list_contacts(contacts): for i in range(len(contacts)): contact = contacts[i] print(str(i+1) + "." + contact[0]) print()

##definition view command

def view_contacts(contacts): number = int(input("Number: ")) if number len (contacts): print("invalid number") else: contact = contacts[number-1] print("Name: " + contact[0]) print("Email: " + contact[1]) print("Phone: " + contact[2]) print() ##definition add command

def add_contacts(contacts): name = input("Name: ") email = input("Email: ") phone = input("Phone: ") contact = [] contact.append(name) contact.append(email) contact.append(phone) contacts.append(contact) write_contacts(contacts) print(name + " was added") print()

##definition delete command

def del_contacts(contacts): number = int(input("Number: ")) if number len (contacts): print("invalid number") else: contact = contacts.pop(number-1) write_contacts(contacts) print(contact[0] + " was deleted") return contacts

def display_menu(): print("Contact Manager") print() print("COMMAND MENU") print("list - Display all contacts", " view - View a contact", " add - Add a contact", " del - Delete a contact", " exit - Exit program") print()

##definition main menu

def main(): display_menu() contacts = read_contacts() while True: command = input("Command: ") if command.lower() == "list": list_contacts(contacts) elif command.lower() == "view": view_contacts(contacts) elif command.lower() == "add": add_contacts(contacts) elif command.lower() == "del": del_contacts(contacts) elif command.lower() == "exit": break else: print("Invalid command. Please try again. ") print("Good bye!") if __name__ == "__main__": main()

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Here is an example of how the outcome should look:

Could not find contacts file! Starting new contacts file. . . Contact Manager COMMAND MENU list - Display all contacts view - View a contact Add a contact - Delete a contact del exit - Exit program Command: list There are no contacts in the list. Command: add Name: Bugsy Lapin Email: blapin@bunnies.org Phone: 352-555-2468 Bugsy Lapin was added Command: view Number: 8 Invalid contact number Command: view Number: B Invalid integer. Command: view Number: 1 Name: Bugsy Lapin Email: blapin@bunnies.org Phone: 352-555-2468 Could not find contacts file! Starting new contacts file. . . Contact Manager COMMAND MENU list - Display all contacts view - View a contact Add a contact - Delete a contact del exit - Exit program Command: list There are no contacts in the list. Command: add Name: Bugsy Lapin Email: blapin@bunnies.org Phone: 352-555-2468 Bugsy Lapin was added Command: view Number: 8 Invalid contact number Command: view Number: B Invalid integer. Command: view Number: 1 Name: Bugsy Lapin Email: blapin@bunnies.org Phone: 352-555-2468