Show7-Pro - Droid

Concepts Covered:

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File handling (open, read, write)
JSON module (json.dump, json.load)
Lists and dictionaries
Functions and loops
Data persistence

🎯 Objective:

Create a simple, text-based contact book application that allows users to:

Add new contacts
View all saved contacts
Search by name
Edit existing contacts
Delete contacts
Automatically save and load data using a JSON file

💡 Code (contact_book.py):

import json
import os

# File to store contacts
CONTACT_FILE = "contacts.json"

# Load contacts if the file exists
def load_contacts():
    if os.path.exists(CONTACT_FILE):
        with open(CONTACT_FILE, "r") as f:
            return json.load(f)
    return []

# Save contacts to the JSON file
def save_contacts(contacts):
    with open(CONTACT_FILE, "w") as f:
        json.dump(contacts, f, indent=4)

# Display all contacts
def view_contacts(contacts):
    if not contacts:
        print("\n📭 No contacts found.\n")
        return
    print("\n📒 Your Contacts:")
    for i, contact in enumerate(contacts, start=1):
        print(f"{i}. {contact['name']} - {contact['phone']} - {contact['email']}")
    print()

# Add a new contact
def add_contact(contacts):
    name = input("👤 Enter name: ")
    phone = input("📞 Enter phone number: ")
    email = input("📧 Enter email: ")

    contacts.append({"name": name, "phone": phone, "email": email})
    save_contacts(contacts)
    print(f"✅ Contact '{name}' added successfully!\n")

# Search for a contact
def search_contact(contacts):
    search_name = input("🔍 Enter name to search: ").lower()
    found = [c for c in contacts if search_name in c['name'].lower()]
    if found:
        print("\n🔎 Search Results:")
        for c in found:
            print(f"👤 {c['name']} | 📞 {c['phone']} | 📧 {c['email']}")
    else:
        print("\n❌ No contacts found with that name.\n")

# Edit an existing contact
def edit_contact(contacts):
    name = input("✏️ Enter the name of the contact to edit: ").lower()
    for contact in contacts:
        if contact['name'].lower() == name:
            print(f"\nEditing contact: {contact['name']}")
            new_name = input("👤 New name (leave blank to keep current): ") or contact['name']
            new_phone = input("📞 New phone (leave blank to keep current): ") or contact['phone']
            new_email = input("📧 New email (leave blank to keep current): ") or contact['email']

            contact.update({"name": new_name, "phone": new_phone, "email": new_email})
            save_contacts(contacts)
            print(f"✅ Contact '{new_name}' updated successfully!\n")
            return
    print("⚠️ Contact not found.\n")

# Delete a contact
def delete_contact(contacts):
    name = input("🗑️ Enter name of contact to delete: ").lower()
    updated_contacts = [c for c in contacts if c['name'].lower() != name]

    if len(updated_contacts) < len(contacts):
        save_contacts(updated_contacts)
        print(f"✅ Contact '{name}' deleted successfully!\n")
    else:
        print("⚠️ Contact not found.\n")

    return updated_contacts

# Main program
def main():
    contacts = load_contacts()
    while True:
        print("===== 📘 CONTACT BOOK =====")
        print("1️⃣ View Contacts")
        print("2️⃣ Add Contact")
        print("3️⃣ Search Contact")
        print("4️⃣ Edit Contact")
        print("5️⃣ Delete Contact")
        print("6️⃣ Quit")

        choice = input("👉 Enter your choice: ")

        if choice == "1":
            view_contacts(contacts)
        elif choice == "2":
            add_contact(contacts)
        elif choice == "3":
            search_contact(contacts)
        elif choice == "4":
            edit_contact(contacts)
        elif choice == "5":
            contacts = delete_contact(contacts)
        elif choice == "6":
            print("👋 Exiting Contact Book. Goodbye!")
            break
        else:
            print("⚠️ Invalid choice. Try again!\n")

if __name__ == "__main__":
    main()

🧠 Example Usage

python contact_book.py

Console Output Example:

===== 📘 CONTACT BOOK =====
1️⃣ View Contacts
2️⃣ Add Contact
3️⃣ Search Contact
4️⃣ Edit Contact
5️⃣ Delete Contact
6️⃣ Quit
👉 Enter your choice: 2
👤 Enter name: Alice
📞 Enter phone number: 123456789
📧 Enter email: alice@example.com
✅ Contact 'Alice' added successfully!