code: def base_preprocessor():
      BasePreprocessor.__abstractmethods__ = set()
      base_processor = BasePreprocessor()
      return base_processor
  
imports: import pytest
  import shutil
  import matchzoo
  from matchzoo.engine.base_preprocessor import BasePreprocessor
label_desc: Use image node_id 1 for calling a global function with example usage: base_preprocessor() and returns: base_processor