code: def init_backend(self, *args, **kwargs):
          
          self.model.attrs = {}
  
          self.use_memory_cache = kwargs.get('use_memory_cache', True)
          if self.use_memory_cache:
              self.init_memory_cache()
          self.use_disk_cache = kwargs.get('use_disk_cache', False)
          if self.use_disk_cache:
              self.init_disk_cache()
          self.load_model()
          self.model.unpicklable += ['_backend']
docs: Initialize the backend.