import telebot
from random import randint

token = "915784377:AAHBa31K_FTfyqYzIGjeRzgT1onwNeackuc"

bot = telebot.TeleBot(token)

def get_json():
    return bot.get_updates()

def get_data(upd):
    return upd[-1]

def get_messageText(last_data):
    return last_data.message.text

def get_dialog(last_data):
    return last_data.message.chat.id

def get_name(last_data):
    return last_data.message.first_name

def send_pic(dialog):
    path = "pic/" + str(randint(1, 3)) + ".jpg"
    img = open(path, 'rb')
    bot.send_photo(dialog, img)

message_id = 0

while True:
    upd = get_json()
    data = get_data(upd)
    text = get_messageText(data)
    dialog = get_dialog(data)
    message_id_last = data.update_id

    if message_id != message_id_last:
        message_id = message_id_last
        if text.lower() == "картинка":
            send_pic(dialog)