text: '''define the config file for cityscapes and resnet101os16'''
  import os
  from .base_cfg import *
  
  
  # modify dataset config
  DATASET_CFG = DATASET_CFG.copy()
  DATASET_CFG.update({
      'type': 'cityscapes',
      'rootdir': os.path.join(os.getcwd(), 'CityScapes'),
  })
  DATASET_CFG['train']['aug_opts'] = [
      ('Resize', {'output_size': (2048, 1024), 'keep_ratio': True, 'scale_range': (0.5, 2.0)}),
      ('RandomCrop', {'crop_size': (512, 1024), 'one_category_max_ratio': 0.75}),
      ('RandomFlip', {'flip_prob': 0.5}),
      ('PhotoMetricDistortion', {}),
      ('Normalize', {'mean': [123.675, 116.28, 103.53], 'std': [58.395, 57.12, 57.375]}),
      ('ToTensor', {}),
      ('Padding', {'output_size': (512, 1024), 'data_type': 'tensor'}),
  ]
  DATASET_CFG['test']['aug_opts'] = [
      ('Resize', {'output_size': (2048, 1024), 'keep_ratio': True, 'scale_range': None}),
      ('Normalize', {'mean': [123.675, 116.28, 103.53], 'std': [58.395, 57.12, 57.375]}),
      ('ToTensor', {}),
  ]
  # modify dataloader config
  DATALOADER_CFG = DATALOADER_CFG.copy()
  DATALOADER_CFG['train'].update(
      {
          'batch_size': 8,
      }
  )
  # modify optimizer config
  OPTIMIZER_CFG = OPTIMIZER_CFG.copy()
  OPTIMIZER_CFG.update(
      {
          'max_epochs': 220
      }
  )
  # modify losses config
  LOSSES_CFG = LOSSES_CFG.copy()
  # modify model config
  MODEL_CFG = MODEL_CFG.copy()
  MODEL_CFG.update(
      {
          'num_classes': 19,
          'backbone': {
              'type': 'resnet101',
              'series': 'resnet',
              'pretrained': True,
              'outstride': 16,
              'use_stem': True,
              'selected_indices': (2, 3),
          },
      }
  )
  # modify inference config
  INFERENCE_CFG = INFERENCE_CFG.copy()
  # modify common config
  COMMON_CFG = COMMON_CFG.copy()
  COMMON_CFG['train'].update(
      {
          'backupdir': 'gcnet_resnet101os16_cityscapes_train',
          'logfilepath': 'gcnet_resnet101os16_cityscapes_train/train.log',
      }
  )
  COMMON_CFG['test'].update(
      {
          'backupdir': 'gcnet_resnet101os16_cityscapes_test',
          'logfilepath': 'gcnet_resnet101os16_cityscapes_test/test.log',
          'resultsavepath': 'gcnet_resnet101os16_cityscapes_test/gcnet_resnet101os16_cityscapes_results.pkl'
      }
  )