a[:] = b 和 a = b[:] 之间的区别?(Python) [英] Difference between a[:] = b and a = b[:]? (Python)

问题描述

我被要求进行编码测试，但我不知道答案.有人有什么想法吗?

I was asked this for a coding test and didn't know the answer. Anyone have any ideas?

推荐答案

[:] 是切片操作符.

当它在左侧时，它会覆盖列表的内容而不创建新的引用.

When it's on the left side, it overwrites the contents of the list without creating a new reference.

当它位于右侧时，它会创建一个具有相同内容的列表副本.

When it's on the right side, it creates a copy of the list with the same contents.

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