title: telegram bot - Chat not found
body: <p>I am totally new to telegram_bot. I want to execute a <code>bot.send_message()</code> in the following code (as commented in the code), but can't do so. Please help.</p>
  
  <pre><code>!pip install python-telegram-bot --upgrade
  import telegram
  bot = telegram.Bot(token='**************')
  bot.send_message(chat_id='******', text="I'm sorry Dave I'm afraid I can't do that.")
  </code></pre>
  
  <p>It errors out as :</p>
  
  <pre><code>1 bot.send_message('mardepbot',"I'm sorry Dave I'm afraid I can't do that.")
  
  /usr/local/lib/python3.6/dist-packages/telegram/bot.py in decorator(self, *args, **kwargs)
       63     def decorator(self, *args, **kwargs):
       64         logger.debug('Entering: %s', func.__name__)
  ---&gt; 65         result = func(self, *args, **kwargs)
       66         logger.debug(result)
       67         logger.debug('Exiting: %s', func.__name__)
  
  /usr/local/lib/python3.6/dist-packages/telegram/bot.py in decorator(self, *args, **kwargs)
       88                 data['reply_markup'] = reply_markup
       89 
  ---&gt; 90         result = self._request.post(url, data, timeout=kwargs.get('timeout'))
       91 
       92         if result is True:
  
  /usr/local/lib/python3.6/dist-packages/telegram/utils/request.py in post(self, url, data, timeout)
      307             result = self._request_wrapper('POST', url,
      308                                            body=json.dumps(data).encode('utf-8'),
  --&gt; 309                                            headers={'Content-Type': 'application/json'})
      310 
      311         return self._parse(result)
  
  /usr/local/lib/python3.6/dist-packages/telegram/utils/request.py in _request_wrapper(self, *args, **kwargs)
      221             raise Unauthorized(message)
      222         elif resp.status == 400:
  --&gt; 223             raise BadRequest(message)
      224         elif resp.status == 404:
      225             raise InvalidToken()
  
  BadRequest: Chat not found
  </code></pre>