code: def read_dataset_metadata(self):
      
      if self.dataset_meta:
        return
      shell_call(['gsutil', 'cp',
                  'gs://' + self.storage_client.bucket_name + '/'
                  + 'dataset/' + self.dataset_name + '_dataset.csv',
                  LOCAL_DATASET_METADATA_FILE])
      with open(LOCAL_DATASET_METADATA_FILE, 'r') as f:
        self.dataset_meta = eval_lib.DatasetMetadata(f)
docs: Read `dataset_meta` field from bucket