是否有类似.replace()的方法用于python中的列表? [英] Is there a method like .replace() for list in python?

问题描述

我使用.split()方法从字符串中列出了一个列表.例如:string =我喜欢鸡肉"，我将使用.split()在字符串 ['I'，'like'，'chicken'] 中列出单词列表现在，如果我想用其他东西代替鸡肉"，我可以使用哪种方法，例如.replace()，但要使用列表?

i've made a list out of a string using .split() method. For example: string = " I like chicken" i will use .split() to make a list of words in the string ['I','like','chicken'] Now if i want to replace 'chicken' with something else, what method i can use that is like .replace() but for a list?

推荐答案

没有内置功能，但这只是循环进行就地替换:

There’s nothing built-in, but it’s just a loop to do the replacement in-place:

for i, word in enumerate(words):
    if word == 'chicken':
        words[i] = 'broccoli'

或较短的选项(如果始终只有一个实例):

or a shorter option if there’s always exactly one instance:

words[words.index('chicken')] = 'broccoli'

或列表理解以创建新列表:

or a list comprehension to create a new list:

new_words = ['broccoli' if word == 'chicken' else word for word in words]

其中任何一个都可以包装成一个函数:

any of which can be wrapped up in a function:

def replaced(sequence, old, new):
    return (new if x == old else x for x in sequence)


new_words = list(replaced(words, 'chicken', 'broccoli'))

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