Using Handlers.xml

<page>
    <h1>Using Handlers</h1>
    <text>
        Handlers are used to instruct PyTgCalls to execute a specific function when a certain event occurs.
        For a much more convenient way to handle updates, you can use the <docs-ref link="/PyTgCalls/Decorators">decorators</docs-ref> instead.
    </text>
    <separator/>
    <h2>Registering Handlers</h2>
    <text>
        To register a handler, you need to use the <ref>add_handler</ref> method.
        This method takes two arguments: the first is the callback function, and the second is the filter.
    </text>
    <syntax-highlight>
        from pytgcalls import PyTgCalls
        from pytgcalls.types import Update
        from pytgcalls import filters as call_filters
        ...

        client = # Here Your MTProto Client
        app = PyTgCalls(client)

        async def handler(client: PyTgCalls, update: Update):
            print(update)
        ...
        app.add_handler(handler, call_filters.stream_end())
        ...
    </syntax-highlight>
    <h2>Removing Handlers</h2>
    <text>
        To remove a handler, you need to use the <ref>remove_handler</ref> method.
        This method takes the callback function as its only argument.
    </text>
    <syntax-highlight>
        from pytgcalls import PyTgCalls
        from pytgcalls.types import Update
        ...

        client = # Here Your MTProto Client
        app = PyTgCalls(client)

        async def handler(client: PyTgCalls, update: Update):
            print(update)
        ...
        app.remove_handler(handler)
        ...
    </syntax-highlight>
</page>