如何在python中随机打印列表中的元素? [英] How can a print elements in a list randomly in python?

问题描述

我有一个列表，我想按随机顺序打印.这是我到目前为止编写的代码:

随机导入words=["python","java","constant","immutable"]因为我的话:打印(我，结束=")input("") #停止窗口关闭

我尝试了多种方法来随机打印它们，例如创建一个变量，只随机选择其中一个，然后随机删除.然后我会重复这个步骤，直到它们都被删除并在另一个变量中.然后我会将变量放在一个列表中，然后将它们打印出来.尽管如此，这一直在产生错误.有没有其他方法可以做到这一点?

解决方案

使用 random.shuffle() 原地打乱列表:

随机导入words = ["python", "java", "constant", "immutable"]random.shuffle(words)打印(*字)输入('')

演示:

<预><代码>>>>随机导入>>>words = ["python", "java", "constant", "immutable"]>>>random.shuffle(words)>>>字['python'、'java'、'常量'、'不可变']

如果你想保留words(保持顺序)，你可以使用带有随机键的sorted()来返回一个新的随机列表:

words = ["python", "java", "constant", "immutable"]print(*sorted(words, key=lambda k: random.random()))

这使 words 保持不变:

<预><代码>>>>words = ["python", "java", "constant", "immutable"]>>>排序(单词，键= lambda k:random.random())['不可变'，'java'，'常量'，'python']>>>字['python'、'java'、'常量'、'不可变']

I've got a list which I want to print in random order. Here is the code I've written so far:

import random
words=["python","java","constant","immutable"]
for i in words:
    print(i, end=" ")
input("") #stops window closing

I've tried a variety of things to print them out randomly, such as making a variable which selects only one of them randomly and then deleting the randomly. I would then repeat this step until they are all deleted and within another variable. Then I would put the variables in a list then print them out. This kept on generating errors though. Is there another way this can be done?

解决方案

Use random.shuffle() to shuffle a list, in-place:

import random

words = ["python", "java", "constant", "immutable"]
random.shuffle(words)
print(*words)

input('')

Demo:

>>> import random
>>> words = ["python", "java", "constant", "immutable"]
>>> random.shuffle(words)
>>> words
['python', 'java', 'constant', 'immutable']

If you wanted to preserve words (maintain the order), you can use sorted() with a random key to return a new randomized list:

words = ["python", "java", "constant", "immutable"]
print(*sorted(words, key=lambda k: random.random()))

This leaves words unaltered:

>>> words = ["python", "java", "constant", "immutable"]
>>> sorted(words, key=lambda k: random.random())
['immutable', 'java', 'constant', 'python']
>>> words
['python', 'java', 'constant', 'immutable']

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