[issue27459] unintended changes occur when dealing with list of list

[Steven D'Aprano]

Steven D'Aprano added the comment:

Hi Zhihan Chen, I see this issue is closed, but for future reference please don't post screenshots to report issues unless they are really needed. For text output, just copy the text from your terminal and paste it into your bug report. Making a screen shot is more work for you, less useful for us, and makes it impossible for the blind and visually impaired to read it using a screen-reader.

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nosy: +steven.daprano

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue27459>
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