code: def get_number(self, question, min_i=float("-inf"), max_i=float("inf"),
                     just_these=None):
          
          try:
              user_answer = self.get_answer(question)
              user_answer = float(user_answer)
  
              if min_i < user_answer < max_i:
                  if just_these:
                      if user_answer in just_these:
                          return user_answer
  
                      exc = "Number cannot be accepted. Just these: "
                      exc += str(just_these)
                      raise Exception(exc)
  
                  return user_answer
  
              exc = "Number is not within limits. "
              exc += "Min is " + str(min_i) + ". Max is " + str(max_i) + ""
              raise Exception(exc)
          except Exception as exc:
              print(str(exc))
              return self.get_number(
                  self.last_question,
                  min_i=min_i,
                  max_i=max_i,
                  just_these=just_these
              )
docs: Parses answer and gets number
  
          :param question: Question: to ask user
          :param min_i: min acceptable number
          :param max_i: max acceptable number
          :param just_these: Accept only these numbers
          :return: User answer