) user_choice = input("\nWhat do you want to do?: ") if user_choice == "a": contact_name = input("Enter contact name: ") if len(contact_name.strip(" ")) == 0: print("Names cannot be empty.") continue elif contacts.contact_exists(contact_name): print("Contact already exists.") continue else: contact_phone = input("Enter contact phone: ") if len(contact_phone.strip(" ")) == 0: print("Numbers cannot be empty.") continue else: contact = {"name": contact_name, "phone": contact_phone} contacts.add_contacts(contact) print("Contact added.\n") continue elif user_choice == "d": contacts.delete_contact() continue elif user_choice == "s": contacts.save_excel(f"{input('File name: ')}.xlsx") break else: print("Invalid input. Value must be one of type 'a', 'b' or 'c'.") except: break