title: TeleBot: AttributeError: 'NoneType' object has no attribute 'format'
body: <p>Good day everybody! I am writing Telegram bot, using pyTelegramBotApi. 
  That's my code:</p>
  
  <pre><code>import telebot
  from telebot import apihelper
  bot = telebot.TeleBot(TOKEN);
  apihelper.proxy = {'https': 'socks5://154.221.21.197:10800'}
  bot.polling()
  </code></pre>
  
  <p>When I try to run it, there is an error:</p>
  
  <pre><code>2019-11-28 00:44:10,836 (util.py:66 PollingThread) ERROR - TeleBot: "AttributeError occurred, args=("'NoneType' object has no attribute 'format'",)
  Traceback (most recent call last):
    File "C:\Users\user\AppData\Local\Programs\Python\Python37-32\lib\site-packages\pytelegrambotapi-3.6.6-py3.7.egg\telebot\util.py", line 60, in run
      task(*args, **kwargs)
    File "C:\Users\user\AppData\Local\Programs\Python\Python37-32\lib\site-packages\pytelegrambotapi-3.6.6-py3.7.egg\telebot\__init__.py", line 278, in __retrieve_updates
      updates = self.get_updates(offset=(self.last_update_id + 1), timeout=timeout)
    File "C:\Users\user\AppData\Local\Programs\Python\Python37-32\lib\site-packages\pytelegrambotapi-3.6.6-py3.7.egg\telebot\__init__.py", line 248, in get_updates
      json_updates = apihelper.get_updates(self.token, offset, limit, timeout, allowed_updates)
    File "C:\Users\user\AppData\Local\Programs\Python\Python37-32\lib\site-packages\pytelegrambotapi-3.6.6-py3.7.egg\telebot\apihelper.py", line 189, in get_updates
      return _make_request(token, method_url, params=payload)
    File "C:\Users\user\AppData\Local\Programs\Python\Python37-32\lib\site-packages\pytelegrambotapi-3.6.6-py3.7.egg\telebot\apihelper.py", line 49, in _make_request
      request_url = base_url.format(token, method_name)
  AttributeError: 'NoneType' object has no attribute 'format'
  "
  Traceback (most recent call last):
    File "C:/Users/user/PycharmProjects/bot/newbot.py", line 14, in &lt;module&gt;
      bot.polling()
    File "C:\Users\user\AppData\Local\Programs\Python\Python37-32\lib\site-packages\pytelegrambotapi-3.6.6-py3.7.egg\telebot\__init__.py", line 391, in polling
    File "C:\Users\user\AppData\Local\Programs\Python\Python37-32\lib\site-packages\pytelegrambotapi-3.6.6-py3.7.egg\telebot\__init__.py", line 414, in __threaded_polling
    File "C:\Users\user\AppData\Local\Programs\Python\Python37-32\lib\site-packages\pytelegrambotapi-3.6.6-py3.7.egg\telebot\util.py", line 79, in raise_exceptions
    File "C:\Users\user\AppData\Local\Programs\Python\Python37-32\lib\site-packages\six-1.13.0-py3.7.egg\six.py", line 696, in reraise
      raise value
    File "C:\Users\user\AppData\Local\Programs\Python\Python37-32\lib\site-packages\pytelegrambotapi-3.6.6-py3.7.egg\telebot\util.py", line 60, in run
    File "C:\Users\user\AppData\Local\Programs\Python\Python37-32\lib\site-packages\pytelegrambotapi-3.6.6-py3.7.egg\telebot\__init__.py", line 278, in __retrieve_updates
    File "C:\Users\user\AppData\Local\Programs\Python\Python37-32\lib\site-packages\pytelegrambotapi-3.6.6-py3.7.egg\telebot\__init__.py", line 248, in get_updates
    File "C:\Users\user\AppData\Local\Programs\Python\Python37-32\lib\site-packages\pytelegrambotapi-3.6.6-py3.7.egg\telebot\apihelper.py", line 189, in get_updates
    File "C:\Users\user\AppData\Local\Programs\Python\Python37-32\lib\site-packages\pytelegrambotapi-3.6.6-py3.7.egg\telebot\apihelper.py", line 49, in _make_request
  AttributeError: 'NoneType' object has no attribute 'format'
  
  Process finished with exit code 1
  </code></pre>
  
  <p>What's it and how can I solve this problem? The proxy is working (tried to connect with app), gunicorn, PySocks, pyTelegramBotAPI, requests, urllib3 latest versions are installed.</p>
  
  <ul>
  <li>IDE: PyCharm 3.0.3</li>
  <li>Python 3.7.4</li>
  </ul>
  
  <p>Thank you!</p>