Handler is a class that defines the logic for processing incoming updates from the server. For example, handling the /start command:

import telekit

class MyHandler(telekit.Handler):

    @classmethod
    def init_handler(cls) -> None:
        # here we’ll define message triggers
        cls.on.command("start").invoke(cls.handle)

    def handle(self):
        self.chain.sender.set_text("Hello!")
        self.chain.send()

telekit.Server(BOT_TOKEN).polling()

Here:

1. We define a handler class MyHandler that inherits from telekit.Handler.
   The class name can be anything, but there must not be two handlers with the same name in the project.

2. In the special class method init_handler, we register a trigger that listens for the /start command
   and specifies that the handle method should be invoked when this command is received.

3. In the handle method, we construct a simple "Hello!" message and send it to the user.

4. The init_handler method is called when an instance of the Server class is created.

Next: Triggers »