如何打乱列表中的顺序？

我想打乱列表中元素的顺序。

from random import shuffle
words = ['red', 'adventure', 'cat', 'cat']
shuffled = shuffle(words)
print(shuffled) # expect new order for, example ['cat', 'red', 'adventure', 'cat']

作为回应我得到None, why?

这是因为random.shuffle就地洗牌并且不返回任何东西（这就是为什么你会得到None).

import random

words = ['red', 'adventure', 'cat', 'cat']
random.shuffle(words)

print(words) # Possible Output: ['cat', 'cat', 'red', 'adventure']

Edit:

根据您的编辑，您需要更改的是：

from random import shuffle

words = ['red', 'adventure', 'cat', 'cat']
newwords = words[:] # Copy words
shuffle(newwords) # Shuffle newwords

print(newwords) # Possible Output: ['cat', 'cat', 'red', 'adventure']

or

from random import sample

words = ['red', 'adventure', 'cat', 'cat']
newwords = sample(words, len(words)) # Copy and shuffle

print(newwords) # Possible Output: ['cat', 'cat', 'red', 'adventure']