我需要编写random.choice的加权版本(列表中的每个元素都有不同的被选中概率).这就是我想出的:
def weightedChoice(choices):
"""Like random.choice, but each element can have a different chance of
being selected.
choices can be any iterable containing iterables with two items each.
Technically, they can have more than two items, the rest will just be
ignored. The first item is the thing being chosen, the second item is
its weight. The weights can be any numeric values, what matters is the
relative differences between them.
"""
space = {}
current = 0
for choice, weight …如果我在列表中有一组项目.我想根据另一个权重列表从该列表中进行选择.
例如我的收藏是['one', 'two', 'three']和权重[0.2, 0.3, 0.5],我希望这个方法在所有抽奖的大约一半中给我'三'.
最简单的方法是什么？