def unique_experiment_identifier(chosen_hyperparam_indices):
	"""
	Returns a unique identifier to save the eval metrics.

	chosen_hyperparam_indices is a list of the indices of the hyperparameters in their respective lists that we are using in this configuration.
	"""

	# Store output ID.
	output_id = ""

	# Output is just the indices of the chosen hyperparameters.
	for i, hyperparam_ix in enumerate(chosen_hyperparam_indices):
		# Do not add underscore if we are at the end of the string.
		output_id += str(hyperparam_ix) + ("_" if i != (len(chosen_hyperparam_indices) - 1) else "")

	# Return output ID.
	return output_id