如何限制数字在指定范围内? (Python)

问题描述

我想将数字限制在一定范围内.目前，我正在执行以下操作:

I want to limit a number to be within a certain range. Currently, I am doing the following:

minN = 1
maxN = 10
n = something() #some return value from a function
n = max(minN, n)
n = min(maxN, n)

这可以将其保留在minN和maxN之内，但是看起来不太好.我该怎么做呢?

This keeps it within minN and maxN, but it doesn't look very nice. How could I do it better?

PS:仅供参考，我正在使用Python 2.6.

PS: FYI, I am using Python 2.6.

推荐答案

def clamp(n, minn, maxn):
    return max(min(maxn, n), minn)

或功能上等效的

clamp = lambda n, minn, maxn: max(min(maxn, n), minn)

现在，您使用:

n = clamp(n, 7, 42)

或使其完全清楚:

n = minn if n < minn else maxn if n > maxn else n

更清晰:

def clamp(n, minn, maxn):
    if n < minn:
        return minn
    elif n > maxn:
        return maxn
    else:
        return n

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