CONTACT BOOK

class ContactBook:
    def __init__(self):
        self.contacts = {}

    def add_contact(self, name, phone, email, address):
        if name not in self.contacts:
            self.contacts[name] = {'phone': phone, 'email': email, 'address': address}
            print(f"Contact '{name}' added successfully.")
        else:
            print(f"Contact '{name}' already exists. Use update option to modify details.")

    def view_contacts(self):
        if not self.contacts:
            print("Contact book is empty.")
        else:
            print("Contact List:")
            for name, details in self.contacts.items():
                print(f"Name: {name}, Phone: {details['phone']}, Email: {details['email']}, Address: {details['address']}")
    
    def search_contact(self, keyword):
        matching_contacts = [(name, details) for name, details in self.contacts.items() if keyword.lower() in name.lower() or keyword in details.values()]
        if matching_contacts:
            print("Matching Contacts:")
            for name, details in matching_contacts:
                print(f"Name: {name}, Phone: {details['phone']}, Email: {details['email']}, Address: {details['address']}")
        else:
            print("No matching contacts found.")

    def update_contact(self, name, phone=None, email=None, address=None):
        if name in self.contacts:
            contact = self.contacts[name]
            if phone:
                contact['phone'] = phone
            if email:
                contact['email'] = email
            if address:
                contact['address'] = address
            print(f"Contact '{name}' updated successfully.")
        else:
            print(f"Contact '{name}' not found. Use add option to create a new contact.")

    def delete_contact(self, name):
        if name in self.contacts:
            del self.contacts[name]
            print(f"Contact '{name}' deleted successfully.")
        else:
            print(f"Contact '{name}' not found.")

def contact_book_app():
    contact_book = ContactBook()

    while True:
        print("\nContact Book Menu:")
        print("1. Add Contact")
        print("2. View Contacts")
        print("3. Search Contact")
        print("4. Update Contact")
        print("5. Delete Contact")
        print("6. Exit")

        choice = input("Enter your choice (1-6): ")

        if choice == '1':
            name = input("Enter contact name: ")
            phone = input("Enter phone number: ")
            email = input("Enter email address: ")
            address = input("Enter address: ")
            contact_book.add_contact(name, phone, email, address)
        elif choice == '2':
            contact_book.view_contacts()
        elif choice == '3':
            keyword = input("Enter name or phone number to search: ")
            contact_book.search_contact(keyword)
        elif choice == '4':
            name = input("Enter contact name to update: ")
            phone = input("Enter new phone number (press enter to keep current): ")
            email = input("Enter new email address (press enter to keep current): ")
            address = input("Enter new address (press enter to keep current): ")
            contact_book.update_contact(name, phone, email, address)
        elif choice == '5':
            name = input("Enter contact name to delete: ")
            contact_book.delete_contact(name)
        elif choice == '6':
            print("Exiting Contact Book. Goodbye!")
            break
        else:
            print("Invalid choice. Please enter a number from 1 to 6.")

if __name__ == "__main__":
    contact_book_app()