class_docstr: Cityscapes Dataloader
code: def pred_offset(self):
      return 0
  
file_path: gluon-cv/gluoncv/data/cityscapes.py
imports: import os
  import numpy
  from PIL import Image
  import mxnet
  from .segbase import SegmentationDataset
label_desc: Use image node_id 6 for calling the CitySegmentation obj's underlying member method code with example usage: obj.pred_offset() and returns: int