def _add_config(self, config_hash, default, config=None):
		key = str(default) + "__" + str(config)
		self.config_types[key] = config_hash
Test reading a structured variable with compression turned on
dataset/ETHPy150Open Knewton/pettingzoo-python/pettingzoo/local_config.py/LocalConfigDefault._add_config--crossover with--dataset/ETHPy150Open Unidata/siphon/siphon/cdmr/tests/test_dataset.py/test_struct_deflate