Introduction:

In today's world, managing contacts efficiently is crucial for both personal and professional endeavors. Whether you are a freelancer, a small business owner, or just someone who wants to keep their contacts organized, having a reliable system in place can save time and effort. In this blog, we will learn the creation of a basic Contact Management System (CMS) using Python. 

Method 1: Using a Dictionary

def add_contact(contacts, name, number):
    contacts[name] = number

def display_contacts(contacts):
    for name, number in contacts.items():
        print(f"{name}: {number}")

def main():
    contacts = {}
    add_contact(contacts, "John Doe", "123-456-7890")
    add_contact(contacts, "Jane Smith", "987-654-3210")
    display_contacts(contacts)

if __name__ == "__main__":
    main()

Output:

John Doe: 123-456-7890
Jane Smith: 987-654-3210

In this method, we use a dictionary to store contacts, where the keys represent the names and the values represent the phone numbers. The add_contact function adds a new contact to the dictionary, while the display_contacts function prints out all the contacts stored in the dictionary.

Method 2: Using Classes

class Contact:
    def __init__(self, name, number):
        self.name = name
        self.number = number

class ContactManager:
    def __init__(self):
        self.contacts = []

    def add_contact(self, contact):
        self.contacts.append(contact)

    def display_contacts(self):
        for contact in self.contacts:
            print(f"{contact.name}: {contact.number}")

def main():
    contact_manager = ContactManager()
    contact_manager.add_contact(Contact("John Doe", "123-456-7890"))
    contact_manager.add_contact(Contact("Jane Smith", "987-654-3210"))
    contact_manager.display_contacts()

if __name__ == "__main__":
    main()

Output:

John Doe: 123-456-7890
Jane Smith: 987-654-3210

This method involves creating two classes: Contact to represent individual contacts and ContactManager to manage a list of contacts. Contacts are added to the ContactManager using the add_contact method, and then displayed using the display_contacts method.

Conclusion:

In this blog, we have explored different methods to implement a basic Contact Management System in Python. We have started with a simple dictionary-based approach, followed by a more object-oriented approach using classes. Depending on your specific needs and preferences, you can choose the method that best suits your requirements.