Python Project: Contact Book

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The Contact Book project is a Python project that allows you to store and manage contacts. The program uses a CSV file to store contact information and provides options to add, update, search, and delete contacts.

Steps for python project

import csv
import os
import sys

Defining Functions

Next, we define several functions – create_csv, load_csv, add_contact, search_contact, update_contact, and delete_contact.

Here, we define functions to create a new CSV file with a header row, load the CSV file into a list of dictionaries, add a new contact to the CSV file, search for a contact by name, update an existing contact, and delete a contact.

def create_csv():
    with open("contacts.csv", "w", newline="") as file:
        writer = csv.writer(file)
        writer.writerow(["Name", "Phone", "Email"])

def load_csv():
    with open("contacts.csv", newline="") as file:
        reader = csv.DictReader(file)
        contacts = []
        for row in reader:
            contacts.append(row)
        return contacts

def add_contact(name, phone, email):
    with open("contacts.csv", "a", newline="") as file:
        writer = csv.writer(file)
        writer.writerow([name, phone, email])

def search_contact(contacts, name):
    for contact in contacts:
        if contact["Name"] == name:
            return contact
    return None

def update_contact(contacts, name, phone, email):
    for contact in contacts:
        if contact["Name"] == name:
            contact["Phone"] = phone
            contact["Email"] = email
            return True
    return False

def delete_contact(contacts, name):
    for i, contact in enumerate(contacts):
        if contact["Name"] == name:
            del contacts[i]
            return True
    return False

def main():
    if not os.path.exists("contacts.csv"):
        create_csv()

Next, we load the contacts from the CSV file using the load_csv function and display a menu with options to add, search, update, and delete contacts.

def main():
    if not os.path.exists("contacts.csv"):
        create_csv()
    contacts = load_csv()
    while True:
        print("Contact Book")
        print("1. Add Contact")
        print("2. Search Contact")
        print("3. Update Contact")
        print("4. Delete Contact")
        print("5. Exit")
        choice = input("Enter your choice: ")
        if choice == "1":
            name = input("Enter name: ")
            phone = input("Enter phone: ")
            email = input("Enter email: ")
            add_contact(name, phone, email)
            print("Contact added successfully.")
        elif choice == "2":
            name = input("Enter name: ")
            contact = search_contact(contacts, name)
            if contact:
                print("Name: ", contact["Name"])
                print("Phone: ", contact["Phone"])
                print("Email: ", contact["Email"])
            else:
                print("Contact not found.")
        elif choice == "3":
            name = input("Enter name: ")
            phone = input("Enter new phone: ")
            email = input("Enter new email: ")
            if update_contact(contacts, name, phone, email):
                print("Contact updated successfully.")
            else:
                print("Contact not found.")
        elif choice == "4":
            name = input("Enter name: ")
            if delete_contact(contacts, name):
                print("Contact deleted successfully.")
            else:
                print("Contact not found.")
        elif choice == "5":
            sys.exit()
        else:
            print("Invalid choice. Please try again.")

if __name__ == "__main__":
    main()

Conclusion of python project

In conclusion, the Contact Book project in Python is a simple but useful application for managing a list of contacts. The program allows the user to add, search, update, and delete contacts from a CSV file.

The code makes use of the csv module to read and write to the file, and includes error handling to prevent the program from crashing in case of invalid inputs.

This project demonstrates how to work with files and data structures in Python, and can be a good starting point for building more complex applications.