class_docstr: abstract class
class_docstr_tok: ["abstract","class"]
docstr: pre-proecss of data
docstr_tok: ["pre-proecss","of","data"]
code: def preprocess_batch(self, batch):
      """pre-proecss of data"""
      raise NotImplementedError()
  
file_path: delta/delta/data/task/base_task.py
imports: import abc
label_desc: Use image node_id 5 for calling the Task obj's underlying member method code with example usage: obj.preprocess_batch(batch) without return types