Why is call.data not responding?

Question

Python

@dp.callback_query_handler()
async def randws(call: CallbackQuery):
    if call.data == 'amf':
        await call.message.answer('hello')

I checked everything 1000 times, the call-back in the inline button is correct, but when I click on the button, it does not return 'hello', please help those who understand.

Answer 1

Your handler @dp.callback_query_handler(text='rand')accepts text, which is needed for regular buttons, after clicking which a message is sent from the user.
For example, you can implement it like this:

@dp.callback_query_handler(lambda c: c.data == 'amf')
async def randws(call: CallbackQuery):
    await call.message.answer('gggg')

In order not to create a bunch of handlers for each callback, I advise you to familiarize yourself with callback_data_factory:
Examples:
callback_data_factory_simple
callback_data_factory
Documentation:
callback_data