title: how to detect gif in telegram bot python
body: <p>everyone. I don´t know how to detect gifs with my bot in telegram. The following example is when bot detect text on the chat and the text is "hi" the bot reply "Hi".</p>
  
  <p>I think that I can do something with content_type but I dont know.</p>
  
  <pre><code>@bot.message_handler(func=lambda message: True)
  def echo_message(message):
      if message.text == 'hi' :
          cid= message.chat.id
          bot.send_message(cid, 'Hi')
  </code></pre>