code: def _preprocess(self, img):
      data = {}
      data["img"] = img
      return self.cfg.transforms(data)["img"]
  
imports: import argparse
  import os
  import numpy
  from paddle.inference import create_predictor, PrecisionType
  from paddle.inference import Config
  from paddleseg.deploy.infer import DeployConfig
  from paddleseg.utils import get_image_list, logger
  from paddleseg.utils.visualize import get_pseudo_color_map
label_desc: Use image node_id 6 for calling the Predictor obj's underlying member method code with example usage: obj._preprocess(img) and returns: self