(python) 如何修改列表？

Question

I have a list that looks something like this: days_list = ['12','554','43','2343','52']

How do I modify it so that it looks like this: days_list = ['days:12', 'days:554', 'days:43', 'days:2343', 'days:52'] ?

Answer 1

根据旧列表创建一个新列表，其中每个元素都是一个带有前缀“days:”的字符串，然后是原始值。

days_list = ['days:{}'.format(value) for value in days_list]

Answer 2

使用列表理解，你可以很容易地做到这一点

result = ['days:'+item for item in days_list]

Answer 3

Write the code as:

days_list = ['days:{}'.format(value) for value in days_list]

or

days_list = [f'days:{value}' for value in days_list]

or

days_list = [f'days:{days_list[x]}' for x in range(0, len(days_list))