compose.py 文件源码

def create_quantiles(items: Sequence, lower_bound, upper_bound):
    """Create quantile start and end boundaries."""

    interval = (upper_bound - lower_bound) / len(items)

    quantiles = ((g, (x - interval, x)) for g, x in
                 zip(items, accumulate(repeat(interval, len(items)))))

    return quantiles