How to add an inline button call in this method?

Question

Python

Hello!
How to display inline button instead of plain text in sender(id, 'Unknown button') ? :)

For example, popup with type show_snackbar?) Python 3.9.1

import vk_api, json, requests, datetime
from vk_api.longpoll import VkLongPoll, VkEventType

vk_session = vk_api.VkApi(token = "*************")
vk = vk_session.get_api()
longpol = VkLongPoll(vk_session)

def get_but(text, color):
  return {
                "action": {
                    "type": "text",
                    "payload": "{\"button\": \"" + "1" + "\"}",
                    "label": f"{text}"
                },
                "color": f"{color}"
            }

keyboard = {
  "one_time" : False,
  "buttons" : [
    [get_but('Button', 'positive')],
    [get_but('Button 2', 'positive')]
  ]
}
keyboard = json.dumps(keyboard, ensure_ascii = False).encode('utf-8')
keyboard = str(keyboard.decode('utf-8'))

def sender(id, text):
  vk_session.method('messages.send', {'user_id' : id, 'message' : text, 'random_id' : 0, 'keyboard' : keyboard})

def main():
  for event in longpol.listen():
    if event.type == VkEventType.MESSAGE_NEW:
      if event.to_me:

        msg = event.text
        id = event.user_id

        if msg in ['Button', 'Button 2']:
          if msg == 'Button':
            sender(id,'Button')
          elif msg == 'Button 2':
            sender(id,'Button 2')
        else:
          sender(id,'Unknown button')

while(True):
  main()