Message 338927 - Python tracker

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Author	terry.reedy
Recipients	rhettinger, serhiy.storchaka, terry.reedy
Date	2019-03-27.00:16:13
SpamBayes Score	-1.0
Marked as misclassified	Yes
Message-id	<1553645773.76.0.568810849183.issue36431@roundup.psfhosted.org>
In-reply-to

Content
3 years ago, Trey Hunter found 11 ways to merge to a new dict. https://treyhunner.com/2016/02/how-to-merge-dictionaries-in-python/ He followed up with a performance comparison. https://gist.github.com/treyhunner/f35292e676efa0be1728 unpacking was nearly twice as fast as the 2nd place methods. (Bigger dict might change the ratio, but I expect unpacking to remain first.) Trey's summary: "This is simple and Pythonic. There are quite a few symbols, but it’s fairly clear that the output is a dictionary at least." I consider the last point a major plus. User comment: "Beautiful. Pythonic. Thank you." No negatives.

3 years ago, Trey Hunter found 11 ways to merge to a new dict.
https://treyhunner.com/2016/02/how-to-merge-dictionaries-in-python/
He followed up with a performance comparison.
https://gist.github.com/treyhunner/f35292e676efa0be1728
** unpacking was nearly twice as fast as the 2nd place methods.
(Bigger dict might change the ratio, but I expect ** unpacking to remain first.)

Trey's summary: "This is simple and Pythonic. There are quite a few symbols, but it’s fairly clear that the output is a dictionary at least."  I consider the last point a major plus.

User comment: "Beautiful. Pythonic. Thank you."  No negatives.

History
Date	User	Action	Args
2019-03-27 00:16:13	terry.reedy	set	recipients: + terry.reedy, rhettinger, serhiy.storchaka
2019-03-27 00:16:13	terry.reedy	set	messageid: <1553645773.76.0.568810849183.issue36431@roundup.psfhosted.org>
2019-03-27 00:16:13	terry.reedy	link	issue36431 messages
2019-03-27 00:16:13	terry.reedy	create