title: Chatterbot - No module named 'chatterbot.trainers' - python 3.x
body: <p>I am using <code>python 3.x</code>. I am getting an error while running this code:</p>
  
  <pre><code>from chatterbot.trainers import ListTrainer # method to train the chatbot
  from chatterbot import ChatBot # import the chatbot
  
  bot = ChatBot('Test')
  
  conv = open('chats.txt', 'r').readlines()
  
  bot.set_trainer(ListTrainer) # set the trainer
  
  bot.train(conv) # train the bot
  
  while True:
  request = input('You: ')
  response = bot.get_response(request)
  
  print('Bot: ', response)
  </code></pre>
  
  <p><strong>Error:</strong></p>
  
  <pre><code>module = self._system_import(name, *args, **kwargs)
  ModuleNotFoundError: No module named 'chatterbot.trainers'; 'chatterbot' is 
  not a package
  </code></pre>
  
  <p>How to fix this error? </p>