new_contents: from abc import ABC, abstractmethod
  
  
  class Pretrained(ABC):
      """The base class for all pretrained task.
      Attributes:
          verbose: A boolean value indicating the verbosity mode.
      """
  
      def __init__(self):
          """Initialize the instance.
          """
          self.model = None
  
      @abstractmethod
      def load(self):
          """load pretrained model into self.model
          """
          pass
  
      @abstractmethod
      def predict(self, x_predict):
          """Return predict results for the given image
          Args:
              x_predict: An instance of numpy.ndarray containing the testing data.
          Returns:
              A numpy.ndarray containing the results.
          """
          pass
subject: add pretrained.py as abstract class