import pandas as pd
table = pd.DataFrame({"kiosk": ["K01", "K02"], "refills": [4, 7], "litres": [8.5, 13.0], "open": [True, False]})
assert table["kiosk"].dtype.kind in "OUT"
assert table["refills"].sum() == 11
assert table["open"].sum() == 1
print("Two identifiers; eleven refills; one open flag")