def clear_cache(client: Client, view: DirectView) -> None:
"""Cache-clearing function from mailing list"""
assert not rc.outstanding, "don't clear history when tasks are outstanding"
client.purge_results("all") # clears controller
client.results.clear()
client.metadata.clear()
view.results.clear()
client.history = []
view.history = []
client.session.digest_history.clear()
