def format_kib_per_second(start, finish, amount_in_bytes):
    try:
        return '{0:02g}'.format((finish - start) / (amount_in_bytes / 1024))
    except ZeroDivisionError:
        return 'NaN'
dataset/ETHPy150Open wal-e/wal-e/wal_e/worker/worker_util.py/format_kib_per_second/swapped operands of `/`