Example With telebot

Let’s write a basic formatting project with telebot module to work with Telegram bots API. This bot makes pretty code formatting and calculates basic statistics.

from typing import Optional, Tuple

from datetime import datetime
import os
from time import time

from telebot import TeleBot

from telegram_text import Bold, Chain, Code, InlineCode, Italic, Underline

API_TOKEN = os.getenv('API_TOKEN')  # Your bot secret token

bot = TeleBot(API_TOKEN)


def execute_python_code(code: str) -> Tuple[Optional[float], Optional[Exception]]:
    """Execute code and return execution time and exception.

    Note:
        Calculation is not perfect, It does not take into account the time it
        takes to translate the string into byte-code.

    Warning:
        This function is not safe, never use it in production.
    """
    try:
        start = time()
        exec(code)
        end = time()
    except Exception as e:
        return None, e

    # Calculate execution time in ms, round it and return
    return round((end - start) * 1000, 2), None


@bot.message_handler()
def format_python_to_pretty_code_block(message):
    # Get user's message
    code = message.text

    # Remember time when we start
    start_time = datetime.now()

    # Execute code
    execution_time, exception = execute_python_code(code)

    # Build a statistics part of the response
    if exception is None:
        # Case when code was executed successfully
        statistics_msg = Chain(
            Italic(f"Execution time: {execution_time} ms"),
            Italic(start_time.ctime()),
            sep='\n',
        )
    else:
        # Case when we got a exception
        statistics_msg = Chain(
            Bold("Runtime error:"),
            InlineCode(f"{exception.__class__.__name__}:\n{exception}\n"),
            Italic(start_time.ctime()),
            sep='\n',
        )

    # Build the response
    msg = Chain(
        Bold("=====") + Underline(Bold("Python Code")) + Bold("====="),
        Code(code, language='python'),
        Bold("======") + Underline(Bold("Statistics")) + Bold("======"),
        statistics_msg,
        Bold("====================="),
        sep='\n\n',
    )

    # Send response to the user
    bot.send_message(
        message.chat.id,  # Chat id
        msg.to_markdown(),  # Render response to MarkdownV2
        parse_mode="MarkdownV2",  # Specify parsing mode to Telegram API
    )


# Start our bot!
if __name__ == "__main__":
    bot.infinity_polling()