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Contact management using Python Homework Solution


Text-based contact management

Project Description

Create a program that a user can use to manage the primary contacts.

Sample Run

Contact Management System

COMMAND MENU

list - Display all contacts

view - View a contact

add - Add a contact

del - Delete a contact

exit - Exit program

Command: list

1. Betty Johnson, 3333

2. Mark Arlington, 4444

Command: view

Number (1 - 2): 3

Invalid number. Try again!

Command: view

Number (1 - 2): 2

Mark Arlington, 4444

Command: add

Name: Andy Patel

Email: andy.patel@hotmail.com

Phone: (415) 222-3333

ID: 5555

Andy Patel, 5555 was added.

Command: del

Number (1 - 3): 0

Invalid number. Try again!

Command: del

Number (1 - 3): 1

Betty Johnson, 3333 was deleted.

Command: list

1. Mark Arlington, 4444

2. Andy Patel, 5555

Command: exit

Thank you for using my app

Specifications

  • Your program should have the following functions:
  • def display(contacts)
  • def add(contacts)
  • def view(contacts)
  • def delete(contacts)
  • def display_title()
  • def display_menu()
  • def main()
    • Use a list of lists (2-dimensional list) to store the data for the contacts. Provide starting data for the following contacts:
  • "Betty Johnson", "betty.johnson@gmail.com", "(408) 111-2222", "3333"
  • "Mark Arlington", "mark.arlington@yahoo.com", "(669) 123-4567", "4444"
    • Your program should display the current number of contacts on the list so that the user knows how to enter valid data. For example, if the list has 3 contacts, your program should display "Number (1 - 3): ".
    • Note that the first index of the 2-dimensional list is 0, but the first contact starts with 1

    Solution:

    ''' def display(contacts): # Checking the list contacts to see if there are any contacts added # If there are no contacts, length of list will be 1 if len(contacts) == 1: print('No contacts added. Please add a contact first') return None # Printing the list with its order number # enumerate() is used to provide serial numbers to container elements for num, contact in enumerate(contacts[1:], 1): print('{}. {}, {}'.format(num, contact[0], contact[-1])) def add(contacts): name = input('Name: ') email = input('Email: ') phone = input('Phone: ') contact_id = input('ID: ') # Adding the user details taken via input to contacts list contacts.append([name, email, phone, contact_id]) print('{}, {} was added.'.format(name, contact_id)) def view(contacts): # Checking the list contacts to see if there are any contacts added # If there are no contacts, length of list will be 1 if len(contacts) == 1: print('No contacts added. Please add a contact first') return None choice = int(input('Number ({} - {}): '.format(1, len(contacts)-1))) # Checking if serial number entered is valid or not if choice < 1 or choice >= len(contacts): print('Invalid Number. Try again!') return None print('{}, {}'.format(contacts[choice][0], contacts[choice][-1])) def delete(contacts): # Checking the list contacts to see if there are any contacts added # If there are no contacts, length of list will be 1 if len(contacts) == 1: print('No contacts added. Please add a contact first') return None # Checking if serial number entered is valid or not choice = int(input('Number ({} - {}): '.format(1, len(contacts)-1))) if choice < 1 or choice >= len(contacts): print('Invalid Number. Try again!') return None # Deleting the specified contact del contacts[choice] def display_title(): print('Contact Management System') def display_menu(): # Printing the Display Menu print() print() print('COMMAND MENU') print('list - Display all contacts') print('view - View a contact') print('add - Add a contact') print('del - Delete a contact') print('exit - Exit program') print() def main(): display_title() # Initializing contacts(list of list) with an empty list # So that contacts added will start with index 1 # If length of contacts list is 1, it is essentially empty contacts = [[]] command = 'None' while command != 'exit': display_menu() command = input('Command: ') valid_commands = ['list', 'view', 'add', 'del', 'exit'] # Checking if the input command is valid or not if command not in valid_commands: print('Invalid Command. Try again!') continue if command == 'list': # Calling the display function display(contacts) elif command == 'view': # Calling the view function view(contacts) elif command == 'add': # Calling the add function add(contacts) elif command == 'del': # Calling the delete function delete(contacts) elif command == 'exit': print() print('Thank you for using my app') break if __name__ == '__main__': main()