需要在集合中找到不大于给定变量的最大数

Question

我有一个设置，权重和整数所需的权重。 我需要删除列表中最接近但不大于所需权重的元素，并将其与actual_weight关联。 到目前为止，这是我的代码：

desired_weight = weights[0]
for i in weights:
 for x in weights:
    if x>i:
        if desired_weight <= x:
            actual_weight = desired_weight
            weights.remove()

Answer 1

假设我了解您的要求，

actual_weight = max([x for x in weights if x <= desired_weight])

Answer 2

您可以尝试以下方法：

desired_weight = weights[0]
diff = inf
actual_weight = 0
for x in weights:
  if x < desired_weight and (x-desired_weight) < diff:
    diff = x - desired_weight
    actual_weight = x

weights.remove(actual_weight)

Answer 3

actual_weight = max([x for x in weights if x <= desired_weight])
weights.remove(actual_weight)