How to make a command (open a function) when a button is clicked?

Question

Python

import telebot 
from telebot import types

bot = telebot.TeleBot("")

@bot.message_handler(commands=['start'])
def start(message):
    markup = types.ReplyKeyboardMarkup()
    buttonA = types.KeyboardButton("1")
    buttonB = types.KeyboardButton("2")
    buttonC = types.KeyboardButton("3")

    markup.row(buttonA, buttonB)
    markup.row(buttonC)

    bot.send_message(message.chat.id, "Выберите нужное вам меню!", reply_markup=markup)

bot.polling(none_stop = True)

Answer 1

Examples on the official github for whom posted?
Here is for InlineKeyboardMarkup

# This example show how to use inline keyboards and process button presses
import telebot
from telebot.types import InlineKeyboardMarkup, InlineKeyboardButton

TELEGRAM_TOKEN = '<TOKEN>'

bot = telebot.TeleBot(TELEGRAM_TOKEN)

def gen_markup():
    markup = InlineKeyboardMarkup()
    markup.row_width = 2
    markup.add(InlineKeyboardButton("Yes", callback_data="cb_yes"),
                               InlineKeyboardButton("No", callback_data="cb_no"))
    return markup

@bot.callback_query_handler(func=lambda call: True)
def callback_query(call):
    if call.data == "cb_yes":
        bot.answer_callback_query(call.id, "Answer is Yes")
    elif call.data == "cb_no":
        bot.answer_callback_query(call.id, "Answer is No")

@bot.message_handler(func=lambda message: True)
def message_handler(message):
    bot.send_message(message.chat.id, "Yes/no?", reply_markup=gen_markup())

bot.infinity_polling()

And here is for replyKeyboardMarkup

# This example shows you how to create a custom QWERTY keyboard using reply keyboard markup
import telebot
from telebot.types import ReplyKeyboardMarkup, KeyboardButton

TOKEN = "<your_token>"
bot = telebot.TeleBot(TOKEN)

keys = ["1","2","3","4","5","6","7","8","9","0","q","w","e","r","t","y","u","i","o","p","a","s","d","f","g","h","j","k","l","z","x","c","v","b","n","m"]
symbols = ["1","2","3","4","5","6","7","8","9","0","!","@","#","$","%","^","&","*","(",")","\'","\"","/","\\",",",".",";",":"]

def keyboard(key_type="Normal"):
    markup = ReplyKeyboardMarkup(row_width=10)
    if key_type == "Normal":
        row = [KeyboardButton(x) for x in keys[:10]]
        markup.add(*row)
        row = [KeyboardButton(x) for x in keys[10:20]]
        markup.add(*row)
        row = [KeyboardButton(x) for x in keys[20:29]]
        markup.add(*row)
        row = [KeyboardButton(x) for x in keys[29:]]
        markup.add(*row)
        markup.add(KeyboardButton("Caps Lock"),KeyboardButton("Symbols"),KeyboardButton("Delete"),KeyboardButton("✅Done"))
    elif key_type == "Symbols":
        row = [KeyboardButton(x) for x in symbols[:10]]
        markup.add(*row)
        row = [KeyboardButton(x) for x in symbols[10:20]]
        markup.add(*row)
        row = [KeyboardButton(x) for x in symbols[20:]]
        markup.add(*row)
        markup.add(KeyboardButton("Caps Lock"),KeyboardButton("Normal"),KeyboardButton("Delete"),KeyboardButton("✅Done"))
    else:
        row = [KeyboardButton(x.upper()) for x in keys[:10]]
        markup.add(*row)
        row = [KeyboardButton(x.upper()) for x in keys[10:20]]
        markup.add(*row)
        row = [KeyboardButton(x.upper()) for x in keys[20:29]]
        markup.add(*row)
        row = [KeyboardButton(x.upper()) for x in keys[29:]]
        markup.add(*row)
        markup.add(KeyboardButton("Normal"),KeyboardButton("Symbols"),KeyboardButton("Delete"),KeyboardButton("✅Done"))
    return markup

@bot.message_handler(commands=["start"])
def start_message(message):
    bot.send_message(message.chat.id,"You can use the keyboard",reply_markup=keyboard())

@bot.message_handler(func=lambda message:True)
def all_messages(message):
    if message.text == "✅Done":
        markup = telebot.types.ReplyKeyboardRemove()
        bot.send_message(message.from_user.id,"Done with Keyboard",reply_markup=markup)
    elif message.text == "Symbols":
        bot.send_message(message.from_user.id,"Special characters",reply_markup=keyboard("Symbols"))
    elif message.text == "Normal":
        bot.send_message(message.from_user.id,"Normal Keyboard",reply_markup=keyboard("Normal"))
    elif message.text == "Caps Lock":
        bot.send_message(message.from_user.id,"Caps Lock",reply_markup=keyboard("Caps"))
    elif message.text == "Delete":
        bot.delete_message(message.from_user.id,message.message_id)
    else:
        bot.send_message(message.chat.id,message.text)

bot.infinity_polling()