def __init__(self, data_dir='', classes=19,
                 train_set_file="", inform_data_file="", normVal=1.10):
        """
        Args:
           data_dir: directory where the dataset is kept
           classes: number of classes in the dataset
           inform_data_file: location where cached file has to be stored
           normVal: normalization value, as defined in ERFNet paper
        """
        self.data_dir = data_dir
        self.classes = classes
        self.classWeights = np.ones(self.classes, dtype=np.float32)
        self.normVal = normVal
        self.mean = np.zeros(3, dtype=np.float32)
        self.std = np.zeros(3, dtype=np.float32)
        self.train_set_file = train_set_file
        self.inform_data_file = inform_data_file

        Args:
           data_dir: directory where the dataset is kept
           classes: number of classes in the dataset
           inform_data_file: location where cached file has to be stored
           normVal: normalization value, as defined in ERFNet paper
        
dataset/cityscapes.py