examples/tensorflow/text-classification/run_glue.py/DataTrainingArguments/__post_init__
class DataTrainingArguments:    def __post_init__(self):
        self.task_name = self.task_name.lower()
        if self.task_name not in task_to_keys.keys():
            raise ValueError("Unknown task, you should pick one in " + ",".join(task_to_keys.keys()))