boilerplate telegram bot code with decorators for admin, private chat and public chat.

telegram_bot.py

from telegram.ext import (Updater, CommandHandler, MessageHandler, Filters)
from functools import wraps

def admin_required(func):
    @wraps(func)
    def getAdmins(bot, chat_id):
        return [admin.user.id for admin in bot.getChatAdministrators(chat_id)]

    def check_admin(*args, **kwargs):
        if args[1].message.chat.type == "private":
            return func(*args, **kwargs)
        elif args[1].message.from_user.id in getAdmins(args[0], args[1].message.chat_id):
                return func(*args, **kwargs)
    return check_admin

def chat(func):
    @wraps(func)
    def public_command(*args, **kwargs):
        if args[1].message.chat.type != "private":
            return func(*args, **kwargs)
    return public_command

def private(func):
    @wraps(func)
    def private_command(*args, **kwargs):
        if args[1].message.chat.type == "private":
            return func(*args, **kwargs)
    return private_command

def echo(bot, update):
    bot.sendMessage(update.message.chat_id, "Hm? Echo?")

@admin_required
def start(bot, update):
    bot.sendMessage(update.message.chat_id, "I'd execute a start command here.")

@chat
def test_public(bot, update):
    bot.sendMessage(update.message.chat_id, "This is a chat only command")

@private
def test_private(bot, update):
    bot.sendMessage(update.message.chat_id, "This only works in private messages")

def main():
    updater = Updater(YOURAPIKEY)
    dp = updater.dispatcher

    dp.add_handler(MessageHandler(Filters.text, echo))
    dp.add_handler(CommandHandler('start', start))
    dp.add_handler(CommandHandler('public', test_public))
    dp.add_handler(CommandHandler('private', test_private))

    updater.start_polling()
    updater.idle()

if __name__ == '__main__':
    main()