复制列表的最佳方法是什么?

问题描述：

复制列表的最佳方法是什么?我知道以下几种方式，哪一种更好?或者有其他方法吗?

What is the best way to copy a list? I know the following ways, which one is better? Or is there another way?

lst = ['one', 2, 3]

lst1 = list(lst)

lst2 = lst[:]

import copy
lst3 = copy.copy(lst)

答

如果你想要一个浅拷贝(元素不被拷贝)使用:

If you want a shallow copy (elements aren't copied) use:

lst2=lst1[:]

如果要进行深拷贝，请使用复制模块:

If you want to make a deep copy then use the copy module:

import copy
lst2=copy.deepcopy(lst1)