class_docstr: A multi-tower multi-GPU predictor.
  It builds one predictor for each tower.
docstr: Returns:
      list[OnlinePredictor]: a list of predictor
docstr_tok: ["Returns",":","list","[","OnlinePredictor","]",":","a","list","of","predictor"]
code: def get_predictors(self):
      """
      Returns:
          list[OnlinePredictor]: a list of predictor
      """
      return self.predictors
  
file_path: tensorpack/tensorpack/predict/multigpu.py
imports: import tensorflow
  from ..input_source import PlaceholderInput
  from ..tfutils.tower import PredictTowerContext
  from ..utils import logger
  from .base import OnlinePredictor
label_desc: Use image node_id 4 for calling the MultiTowerOfflinePredictor obj's underlying member method code with example usage: obj.get_predictors() and returns: self