old_contents: from pywatson.answer.answer import Answer
  from pywatson.question.question import Question
  import requests
  
  
  class Watson:
      """The Watson API adapter class"""
  
      def __init__(self, url, username, password):
          self.url = url
          self.username = username
          self.password = password
  
      def ask_question(self, question_text, question=None):
          """Ask Watson a question via the Question and Answer API
  
          :param question_text: question to ask Watson
          :type question_text: str
          :param question: if question_text is not provided, a Question object
                           representing the question to ask Watson
          :type question: Question
          :return: Answer
          """
          if question is not None:
              q = question.to_dict()
          else:
              q = Question(question_text).to_dict()
          r = requests.post(self.url + '/question', json=q)
          return Answer(r.json())
  
new_contents: from pywatson.answer.answer import Answer
  from pywatson.question.question import Question
  import requests
  
  
  class Watson(object):
      """The Watson API adapter class"""
  
      def __init__(self, url, username, password):
          self.url = url
          self.username = username
          self.password = password
  
      def ask_question(self, question_text, question=None):
          """Ask Watson a question via the Question and Answer API
  
          :param question_text: question to ask Watson
          :type question_text: str
          :param question: if question_text is not provided, a Question object
                           representing the question to ask Watson
          :type question: Question
          :return: Answer
          """
          if question is not None:
              q = question.__dict__
          else:
              q = Question(question_text).__dict__
          r = requests.post(self.url + '/question', json=q)
          return Answer(r.json())
  
subject: Use __dict__ instead of to_dict()