Question

Need help. Please write Python program that answer the prompt and has an sample output as shown below. Thank you.

Answer 1

Source Code :

def display(contacts):#function to display contacts
    if len(contacts) == 0:#if no contacts present
        print("No Contacts to display.\n")
        return
    else:#if contacts are present
        i = 1  # For printing the index as string on the contact
        for row in contacts:#loop for all contacts
            print("{}. {}".format(str(i), row[0]))
            i += 1#increment number to display contact number
        print()


def add(contacts):#function to add contact
    name = input("Name: ") #user input for name
    email = input("Email: ") #user input for email
    phone = input("Phone: ") #user input for phone
    contacts.append([name, email, phone])#add details to list
    print("{} was added.\n".format(name))


def view(contacts):#function to view contacts
    number = int(input("Number: ")) #input number from user
    if number <= len(contacts) + 1 and number>0:#if valid user number is provided
        contact = contacts[number - 1] #contact row
        print("Name: {}\nEmail: {}\nPhone: {}\n".format(contact[0], contact[1], contact[2]))
    else:#if number not in range
        print("Enter valid Contact Number\n")
        return


def delete(contacts):#function to delete contact
    number = int(input("Number: "))#input number from user
    name =  contacts.pop(number-1)[0]#delete contact using index
    print("{} was deleted\n".format(name))


def display_title():  # funnction to display title
    print("Contact Manager\n")


def display_menu():  # function to display menu
    print("list - Display all contacts\nview - View a contact\n"
          "add - Add a contact\ndel - Delete a contact\nexit - Exit program\n")


def main():#main program
    #2-dimensional storage of contacts
    contacts = [["Guido van Rossum", "guido@python.org", "+31 0474 33 8826"],
                ["Eric Idle", "eric@ericidle.com", "+44 20 7946 0958"]]
    display_title()#function call
    display_menu()#function call
    while True:#loop untill exit
        option = input("Command:")#user input for command option
        if option == "exit":#to exit 
            print("\nThank you for using my app.")
            break#break loop
        elif option in ["list", "view", "add", "del"]: #valid options to proceed
            if option == "list":
                display(contacts)#function call
                continue
            if option == "view":
                view(contacts)#function call
                continue
            if option == "add":
                add(contacts)#function call
                continue
            if option == "del":
                delete(contacts)#function call
                continue

        else: #invalid options
            print("Enter a valid option\n")


main() #call main program

Screenshot of Code :

UUUUU def display (contacts):#function to display contacts if len(contacts) == 0:#if no contacts present print("No Contacts to display. \n") return else:#if contacts are present i = 1 # For printing the index as string on the contact for row in contacts:#loop for all contacts print("{}. {}".format(str(i), row[0])) i t= 1#increment number to display contact number print() def add(contacts):#function to add contact name = input("Name: ") #user input for name email = input ("Email: ") #user input for email phone = input("Phone: ") #user input for phone contacts.append( [name, email, phone] )#add details to list print("{} was added. \n". format (name)) def view( contacts):#function to view contacts number = int(input("Number: ")) #input number from user if number < len(contacts) + 1 and number>0:#if valid user number is provided contact = contacts [number - 1] #contact row print("Name: {}\nEmail: {}\nPhone: {}\n".format(contact[0], contact[1], contact[2])) else:#if number not in range print("Enter valid Contact Number\n") return def delete( contacts):#function to delete contact number = int(input("Number: "))#input number from user name = contacts.pop(number-1)[0]#delete contact using index print("{} was deleted\n".format(name))

def display_title(): # funnction to display title print("Contact Manager\n") def display_menu(): # function to display menu print("list - Display all contacts\nview - View a contact\n" "add - Add a contact\ndel - Delete a contact\nexit - Exit program\n") def main(): #main program #2-dimensional storage of contacts contacts = [[ "Guido van Rossum", "guido@python.org", "+31 0474 33 8826"), ["Eric Idle", "eric@ericidle.com", "+44 20 7946 0958"]] display_title()#function call display_menu()#function call while True:#loop untill exit option = input ("Command :")#user input for command option if option == "exit":#to exit print("\nThank you for using my app.") break#break Loop elif option in ["list", "view", "add", "del"]: #valid options to proceed if option == "list": display(contacts)#function call continue if option == "view": view contacts)#function call continue if option == "add": add(contacts)#function call continue if option == "del": delete( contacts)#function call continue else: #invalid options print("Enter a valid option\n") main() #call main program

Output - Screenshot :

Contact Manager list - Display all contacts view - View a contact add - Add a contact del - Delete a contact exit - Exit program Command: list 1. Guido van Rossum 2. Eric Idle Command:view Number: 2 Name: Eric Idle Email: eric@ericidle.com Phone: +44 20 7946 0958 Command: add Name: Mike Murach Email: mike@murach.com Phone: 559-123-4567 Mike Murach was added.

Command: del Number: 1 Guido van Rossum was deleted Command: exit Thank you for using my app.

Note :

• Code written in python3
• Explanation provided in code within the comments
• If any doubts feel free to comment here