根据值随机选择字典键

Question

我有一本这样的字典：{"one": 5, "two": 1, "three": 25, "four": 14}

我想从字典中选择一个与值成比例的键，即 "three" 的机会最大，然后 "four" 然后 "one" 然后 "two".我看过 this 问题，但它似乎特定于数字加起来为 1 的时间。

我真的不知道如何开始，不胜感激。

Answer 1

使用 random.choices 和 weights 参数：

random.choices(population, weights=None, *, cum_weights=None, k=1)

Return a k sized list of elements chosen from the population with replacement. If the population is empty, raises IndexError.

If a weights sequence is specified, selections are made according to the relative weights. Alternatively, if a cum_weights sequence is given, the selections are made according to the cumulative weights

import random

d = {"one": 5, "two": 1, "three": 25, "four": 14}
keys = list(d.keys())
values = list(d.values())
random_key = random.choices(keys, weights=values)

print(random_key)
# ['three']

根据值随机选择字典键

Choose dictionary key randomly based on value

python

random

dictionary

probability