Message 401626 - Python tracker

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Author	steven.daprano
Recipients	ohwphil, steven.daprano
Date	2021-09-11.03:07:46
SpamBayes Score	-1.0
Marked as misclassified	Yes
Message-id	<1631329666.83.0.0469254858984.issue45169@roundup.psfhosted.org>
In-reply-to

Content
This is not a bug. No copy is made at all, neither shallow nor deep. This is described in the documentation for built-in types: https://docs.python.org/3/library/stdtypes.html#common-sequence-operations and is similar to the issue in the FAQs: https://docs.python.org/3/faq/programming.html#id16 I acknowledge that this is sometimes confusing for beginners, but it is just one of those things that programmers have to learn. Sequence multiplication does not copy the items, it replicates references to the same item.

This is not a bug. No copy is made at all, neither shallow nor deep.

This is described in the documentation for built-in types:

https://docs.python.org/3/library/stdtypes.html#common-sequence-operations

and is similar to the issue in the FAQs:

https://docs.python.org/3/faq/programming.html#id16


I acknowledge that this is sometimes confusing for beginners, but it is just one of those things that programmers have to learn. Sequence multiplication does not copy the items, it replicates references to the same item.

History
Date	User	Action	Args
2021-09-11 03:07:46	steven.daprano	set	recipients: + steven.daprano, ohwphil
2021-09-11 03:07:46	steven.daprano	set	messageid: <1631329666.83.0.0469254858984.issue45169@roundup.psfhosted.org>
2021-09-11 03:07:46	steven.daprano	link	issue45169 messages
2021-09-11 03:07:46	steven.daprano	create