在 python 列表中选择多个元素

Question

如何从列表中选择随机多个元素？ 我从互联网上查看但找不到任何东西。

words=["ar","aba","oto","bus"]

Answer 1

您可以使用random.sample()来实现：

from random import sample

words = ["ar", "aba", "oto", "bus"]
selected = sample(words, 2)

这将从单词列表中随机 select 2 个单词。 您可以查看 Python文档了解更多详细信息。

Answer 2

我想：

import random as rd
words=["ar","aba","oto","bus"]
random_words = [word for word in words if rd.random()>1/2]

您可以将 1/2 调整为 0 到 1 之间的任何值，以近似初始列表中所选单词的百分比。

Answer 3

使用random

这是示例

• random.choice

>>> import random
>>> words=["ar","aba","oto","bus"]
>>> print(random.choice(words))
ar
>>> print(random.choice(words))
ar
>>> print(random.choice(words))
oto
>>> print(random.choice(words))
aba
>>> print(random.choice(words))
ar
>>> print(random.choice(words))
bus

• random.sample # sample 需要一个额外的参数来传递一个返回元素的列表

>>> print(random.sample(words, 3))
['bus', 'ar', 'oto']
>>> print(random.sample(words, 3))
['ar', 'oto', 'aba']
>>> print(random.sample(words, 2))
['aba', 'bus']
>>> print(random.sample(words, 2))
['ar', 'aba']
>>> print(random.sample(words, 1))
['ar']
>>> print(random.sample(words, 1))
['ar']
>>> print(random.sample(words, 1))
['oto']
>>> print(random.sample(words, 1))
['bus']

Answer 4

您可以使用random库

方法 1 - random.choice()

from random import choice

words=["ar","aba","oto","bus"]
word = choice(words)
print(word)

方法 2 - 生成随机索引

from random import randint

words=["ar","aba","oto","bus"]
ind = randint(0, len(words)-1)
word = words[ind]
print(word)

方法 3 - Select 多个项目

from random import choices

words=["ar","aba","oto","bus"]
selected = choices(words, k=2)   # k is the elements count to select
print(selected)