text: import shutil
  import os
  
  gtFINE_TRAIN_DIR = "../../data/gtFine/train"
  gtFINE_TEST_DIR = "../../data/gtFine/test"
  gtFINE_VAL_DIR = "../../data/gtFine/val"
  leftImg8bit_TRAIN_DIR = "../../data/leftImg8bit/train"
  leftImg8bit_TEST_DIR = "../../data/leftImg8bit/test"
  leftImg8bit_VAL_DIR = "../../data/leftImg8bit/val"
  
  DATA_DIR = [gtFINE_TRAIN_DIR,
              gtFINE_TEST_DIR,
              gtFINE_VAL_DIR,
              leftImg8bit_TRAIN_DIR,
              leftImg8bit_TEST_DIR,
              leftImg8bit_VAL_DIR]
  
  for data_DIR in DATA_DIR:
      for city in os.listdir(data_DIR):
          city_DIR = "{}/{}".format(data_DIR, city)
          for filename in os.listdir(city_DIR):
              shutil.move("{}/{}".format(city_DIR, filename), "{}/{}".format(data_DIR, filename))
          os.rmdir(city_DIR)