Name and Email Address Program code:

import pickle

def load_dictionary(file_path):
    try:
        with open(file_path, 'rb') as file:
            dictionary = pickle.load(file)
    except FileNotFoundError:
        dictionary = {}
    
    return dictionary

def save_dictionary(dictionary, file_path):
    with open(file_path, 'wb') as file:
        pickle.dump(dictionary, file)

def display_menu():
    print("Menu:")
    print("1. Look up a person’s email address")
    print("2. Add a new name and email address")
    print("3. Change an email address")
    print("4. Delete a name and email address")
    print("5. Exit")

def look_up_email(dictionary):
    name = input("Enter the name to look up: ")
    if name in dictionary:
        email = dictionary[name]
        print("Email address for {} is: {}".format(name, email))
    else:
        print("Name not found.")

def add_new_entry(dictionary):
    name = input("Enter the name: ")
    email = input("Enter the email address: ")
    dictionary[name] = email
    print("Name and email address added.")

def change_email(dictionary):
    name = input("Enter the name for which you want to change the email address: ")
    if name in dictionary:
        new_email = input("Enter the new email address: ")
        dictionary[name] = new_email
        print("Email address changed.")
    else:
        print("Name not found.")

def delete_entry(dictionary):
    name = input("Enter the name to delete: ")
    if name in dictionary:
        del dictionary[name]
        print("Name and email address deleted.")
    else:
        print("Name not found.")

# File path to store the dictionary
file_path = "dictionary.pickle"

# Load the dictionary from the file
dictionary = load_dictionary(file_path)

# Main program loop
while True:
    display_menu()
    choice = input("Enter your choice (1-5): ")

    if choice == "1":
        look_up_email(dictionary)
    elif choice == "2":
        add_new_entry(dictionary)
    elif choice == "3":
        change_email(dictionary)
    elif choice == "4":
        delete_entry(dictionary)
    elif choice == "5":
        # Save the dictionary to the file and exit
        save_dictionary(dictionary, file_path)
        print("Dictionary saved. Exiting the program.")
        break
    else:
        print("Invalid choice. Please try again.")

Executed Output:

Menu:
1. Look up a person’s email address
2. Add a new name and email address
3. Change an email address
4. Delete a name and email address
5. Exit
Enter your choice (1-5): 1
Enter the name to look up: Krish
Name not found.
Menu:
1. Look up a person’s email address
2. Add a new name and email address
3. Change an email address
4. Delete a name and email address
5. Exit
Enter your choice (1-5): 2
Enter the name: Charless
Enter the email address: Charless@gmail.com
Name and email address added.
Menu:
1. Look up a person’s email address
2. Add a new name and email address
3. Change an email address
4. Delete a name and email address
5. Exit
Enter your choice (1-5): 2
Enter the name: Krish
Enter the email address: Krish@gmail.com
Name and email address added.
Menu:
1. Look up a person’s email address
2. Add a new name and email address
3. Change an email address
4. Delete a name and email address
5. Exit
Enter your choice (1-5): 3
Enter the name for which you want to change the email address: Krish
Enter the new email address: Krish123@gmail.com
Email address changed.
Menu:
1. Look up a person’s email address
2. Add a new name and email address
3. Change an email address
4. Delete a name and email address
5. Exit
Enter your choice (1-5): 1
Enter the name to look up: Krish
Email address for Krish is: Krish123@gmail.com
Menu:
1. Look up a person’s email address
2. Add a new name and email address
3. Change an email address
4. Delete a name and email address
5. Exit
Enter your choice (1-5): 4
Enter the name to delete: Krish
Name and email address deleted.
Menu:
1. Look up a person’s email address
2. Add a new name and email address
3. Change an email address
4. Delete a name and email address
5. Exit
Enter your choice (1-5): 1
Enter the name to look up: Krish
Name not found.
Menu:
1. Look up a person’s email address
2. Add a new name and email address
3. Change an email address
4. Delete a name and email address
5. Exit
Enter your choice (1-5): 5
Dictionary saved. Exiting the program.