pip install python-telegram-bot

import logging
from telegram import Update
from telegram.ext import Application, CommandHandler, ContextTypes

# Enable logging
logging.basicConfig(format="%(asctime)s - %(name)s - %(levelname)s - %(message)s", level=logging.INFO)

TOKEN = 'YOUR_TELEGRAM_API_TOKEN'

def main() -> None:
    """Start the bot."""
    application = Application.builder().token(TOKEN).build()

    # We will add command handlers here in the next steps
    # application.add_handler(CommandHandler("export", export_members))

    print("Bot is running...")
    application.run_polling()

if __name__ == "__main__":
    main()

# Hashtags: #Setup #TelegramAPI #PythonBot #BotFather

import sqlite3
from datetime import datetime

DB_NAME = 'bot_logs.db'

def setup_database():
    """Creates the database table if it doesn't exist."""
    conn = sqlite3.connect(DB_NAME)
    cursor = conn.cursor()
    cursor.execute('''
        CREATE TABLE IF NOT EXISTS export_logs (
            id INTEGER PRIMARY KEY AUTOINCREMENT,
            chat_id INTEGER NOT NULL,
            chat_title TEXT,
            requested_by_id INTEGER NOT NULL,
            requested_by_username TEXT,
            timestamp TEXT NOT NULL
        )
    ''')
    conn.commit()
    conn.close()

def log_export_action(chat_id, chat_title, user_id, username):
    """Logs a successful export action to the database."""
    conn = sqlite3.connect(DB_NAME)
    cursor = conn.cursor()
    timestamp = datetime.now().strftime("%Y-%m-%d %H:%M:%S")
    cursor.execute(
        "INSERT INTO export_logs (chat_id, chat_title, requested_by_id, requested_by_username, timestamp) VALUES (?, ?, ?, ?, ?)",
        (chat_id, chat_title, user_id, username, timestamp)
    )
    conn.commit()
    conn.close()

# Hashtags: #SQLite #DatabaseDesign #Logging #DataPersistence

# database_setup.py
import sqlite3

def setup_database():
    conn = sqlite3.connect('conversions.db')
    cursor = conn.cursor()
    
    # Create table to store conversion logs
    cursor.execute('''
        CREATE TABLE IF NOT EXISTS conversions (
            id INTEGER PRIMARY KEY AUTOINCREMENT,
            user_id INTEGER NOT NULL,
            original_filename TEXT NOT NULL,
            converted_filename TEXT NOT NULL,
            conversion_type TEXT NOT NULL,
            timestamp DATETIME DEFAULT CURRENT_TIMESTAMP
        )
    ''')
    
    conn.commit()
    conn.close()
    print("Database setup complete. 'conversions.db' is ready.")

if __name__ == '__main__':
    setup_database()

# converter_bot.py
import logging
import os
import sqlite3
import subprocess
from telegram import Update
from telegram.ext import Application, CommandHandler, MessageHandler, filters, ContextTypes

# Enable logging
logging.basicConfig(format='%(asctime)s - %(name)s - %(levelname)s - %(message)s', level=logging.INFO)

# --- Bot Token ---
TELEGRAM_TOKEN = "YOUR_TELEGRAM_BOT_TOKEN"

# --- Command Handlers ---
async def start(update: Update, context: ContextTypes.DEFAULT_TYPE) -> None:
    user = update.effective_user
    await update.message.reply_html(
        rf"Hi {user.mention_html()}! Send me a PDF or EPUB file to convert.",
    )

async def help_command(update: Update, context: ContextTypes.DEFAULT_TYPE) -> None:
    await update.message.reply_text("Simply send a .pdf file to get an .epub, or send an .epub file to get a .pdf. Note: Conversion quality depends on the source file's structure.")

from PIL import ImageFilter
blurred_img = img.filter(ImageFilter.BLUR)

box_blur = img.filter(ImageFilter.BoxBlur(5))

gaussian_blur = img.filter(ImageFilter.GaussianBlur(radius=2))

sharpened = img.filter(ImageFilter.SHARPEN)

edges = img.filter(ImageFilter.FIND_EDGES)

edge_enhanced = img.filter(ImageFilter.EDGE_ENHANCE)

embossed = img.filter(ImageFilter.EMBOSS)

contours = img.filter(ImageFilter.CONTOUR)

from PIL import ImageEnhance
enhancer = ImageEnhance.Color(img)
vibrant_img = enhancer.enhance(2.0)

enhancer = ImageEnhance.Brightness(img)
bright_img = enhancer.enhance(1.5)

enhancer = ImageEnhance.Contrast(img)
contrast_img = enhancer.enhance(1.5)

enhancer = ImageEnhance.Sharpness(img)
sharp_img = enhancer.enhance(2.0)

from PIL import ImageDraw, ImageFont
draw = ImageDraw.Draw(img)
font = ImageFont.truetype("arial.ttf", 36)
draw.text((10, 10), "Hello", font=font, fill="red")

draw.line((0, 0, 100, 200), fill="blue", width=3)

draw.rectangle([10, 10, 90, 60], outline="green", width=2)

draw.ellipse([100, 100, 180, 150], fill="yellow")

draw.polygon([(10,10), (20,50), (60,10)], fill="purple")

from dataclasses import dataclass

# --- BEFORE: Using a standard class ---
# A lot of boilerplate code is needed for basic functionality.

class ProductOld:
    def __init__(self, name: str, price: float, sku: str):
        self.name = name
        self.price = price
        self.sku = sku

    def __repr__(self):
        return f"ProductOld(name='{self.name}', price={self.price}, sku='{self.sku}')"

    def __eq__(self, other):
        if not isinstance(other, ProductOld):
            return NotImplemented
        return (self.name, self.price, self.sku) == (other.name, other.price, other.sku)

# Example Usage
product_a = ProductOld("Laptop", 1200.00, "LP-123")
product_b = ProductOld("Laptop", 1200.00, "LP-123")

print(product_a)  # Output: ProductOld(name='Laptop', price=1200.0, sku='LP-123')
print(product_a == product_b)  # Output: True


# --- AFTER: Using a dataclass ---
# The code is concise, readable, and less error-prone.

@dataclass(frozen=True) # frozen=True makes instances immutable
class Product:
    name: str
    price: float
    sku: str

# Example Usage
product_c = Product("Laptop", 1200.00, "LP-123")
product_d = Product("Laptop", 1200.00, "LP-123")

print(product_c)  # Output: Product(name='Laptop', price=1200.0, sku='LP-123')
print(product_c == product_d)  # Output: True

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