title: How to send file according to file ID on Telegram
body: <p>How can I send (not forward) file existing on Telegram to user according to file ID?</p>
  
  <p>I know all files uploaded on Telegram have unique ID. How can I extract that ID and what's the function or method to send that file by extracted ID?
  (I use Python Telepot library)</p>
  
  <pre><code>import telepot
  from telepot.loop import MessageLoop
  def on_chat_message(msg):
  content_type, chat_type, chat_id = telepot.glance(msg,'chat')
  if content_type == 'text':
      user_msg_text = msg['text']
      if user_msg_text == '/start':
          bot.sendDocument(chat_id=chat_id, )
  TOKEN = "479761462:AAE8yqX2RGCbynHJgShIdJzCZWYF9SSBUkU"
  bot = telepot.Bot(TOKEN)
  MessageLoop(bot, {'chat': on_chat_message,
                    'callback_query': on_callback_query}).run_as_thread()
  print('Listening ...')
  </code></pre>
  
  <p>what I should enter on second argument of sendDocument() method?</p>