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Showing content from https://stackoverflow.com/questions/79735051/inlinekeyboardbutton-with-callback-data-doesnt-work below:

python - InlineKeyboardButton with callback_data doesn't work

InlineKeyboardButton with callback_data doesn't work. When I click on it, nothing happens.

Here is how I create the button:

from django.apps import apps
from asgiref.sync import sync_to_async
from telegram import Update, InlineKeyboardMarkup, InlineKeyboardButton, WebAppInfo
from telegram.ext import CommandHandler, ApplicationBuilder, MessageHandler, filters, CallbackQueryHandler

async def start(self, update: Update, context):
    keyboard = InlineKeyboardMarkup([
        [InlineKeyboardButton("Already registred", callback_data="already_registered")],
        [InlineKeyboardButton("Register", web_app=WebAppInfo(url=WEB_APP_URL))]
    ])

    await update.message.reply_text(
        "Welcome",
        reply_markup=keyboard
    )
    return

This is the callback query handler:

async def button(self, update: Update, context):
    query = update.callback_query
    if not query:
        return

    await query.answer()

    if query.data == "already_registered":
        await context.bot.send_message(
            chat_id=update.message.chat_id,
            text='Good'
        )
        return

and this is how I run:

def run(self):
    TOKEN = apps.get_model('app.Config').objects.get_mailing_tg_bot_token()
    app = ApplicationBuilder().token(TOKEN).build()
    app.add_handler(CommandHandler('start', self.start))
    app.add_handler(CallbackQueryHandler(self.button))

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