title: A Button, using telebot library
body: <p>I have a <code>handler</code> for upload documents in telegram bot. I would like to get if user presses button <code>1</code> - the handler starts to work. But I can't undestand , what I should do with param <code>message</code>, I need another argument <strong>not</strong> <code>message</code> in <code>progress_step</code> for my handler of uploading docs and pictures in order to see my uploading file, but now I get for handler text:<code>1</code>.Plese&lt; can you help?</p>
  
  <p>My code:</p>
  
  <pre><code>import telebot
  from telebot import types
  
  @bot.message_handler(func=lambda m: True, content_types=['document'])
  def handle_docs_photo(message):
              try:
                  chat_id = message.chat.id
  
                  file_info = bot.get_file(message.document.file_id)
                  downloaded_file = bot.download_file(file_info.file_path)
  
                  src = 'B:/' + message.document.file_name;
                  with open(src, 'wb') as new_file:
                      new_file.write(downloaded_file)
  
                  bot.reply_to(message, "save that")
              except Exception as e:
                  bot.reply_to(message, e)
  
  
  @bot.message_handler(commands=['help', 'start'])
  def send_welcome(message):
      markup = types.ReplyKeyboardMarkup(one_time_keyboard=True)
      markup.add('1', '2') #Имена кнопок
      msg = bot.reply_to(message, 'Test text', reply_markup=markup)
      bot.register_next_step_handler(msg, process_step)
  
  def process_step(message):
      chat_id = message.chat.id
      if message.text=='1':
          #here should be  def handle_docs_photo(message):
      else:
          pass
  </code></pre>