old_contents: from abc import ABCMeta, abstractmethod
  
  class EmbeddingModel(metaclass=ABCMeta):
  
      @abstractmethod
      def build(self):
          pass
  
      @abstractmethod
      def _loss(self):
          pass
  
      @abstractmethod
      def train(self):
          pass
  
  class Classifier(metaclass=ABCMeta):
  
      @abstractmethod
      def build(self):
          pass
  
      @abstractmethod
      def train(self):
          pass
  
      @abstractmethod
      def predict(self):
          pass
  
new_contents: from abc import ABCMeta, abstractmethod
  
  class EmbeddingModel(metaclass=ABCMeta):
  
      @abstractmethod
      def build(self):
          pass
  
      @abstractmethod
      def _loss(self):
          pass
  
      @abstractmethod
      def train(self):
          pass
  
subject: remove classifier temp model