text: Make better, upgraded class Purtek for holding question answer data for training Keras Transformer model:
  
  class Purtek:
      """ Single data representation for PurtkGPT """
  
      def __init__(self, question: str, answer: str, contex = '', kategoria = Kategoria.BRAK):
          # DATA
          self.question = question
          self.answer = answer
          self.contex = contex
  
          # INFO
          self.kategoria = kategoria
  		
      def save(self, file_name):
          with open(file_name, 'w') as f:
              json.dump(self.__dict__, f)
  
      def load(self, file_name):
          with open(file_name, 'r') as f:
              self.__dict__.update(json.load(f))
  			
      def __dict__(self):
          return {
              'question': self.question,
              'answer': self.answer,
              'contex': self.contex,
              'kategoria': self.kategoria
          }