Message 246454 - Python tracker

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Author	Bastiaan Albarda
Recipients	Bastiaan Albarda, dechamps, zorceta
Date	2015-07-08.09:53:24
SpamBayes Score	-1.0
Marked as misclassified	Yes
Message-id	<1436349204.33.0.219365485704.issue24589@psf.upfronthosting.co.za>
In-reply-to

Content
The * operator lets you use the same object multiple times, thereby saving resources. If you want unique objects use comprehension: >>> v = [[] for x in range(10)] >>> v[3].append(3) >>> v [[], [], [], [3], [], [], [], [], [], []] >>> v[3] += [3] >>> v [[], [], [], [3, 3], [], [], [], [], [], []]

The * operator lets you use the same object multiple times, thereby saving resources. 

If you want unique objects use comprehension:
>>> v = [[] for x in range(10)]
>>> v[3].append(3)
>>> v
[[], [], [], [3], [], [], [], [], [], []]
>>> v[3] += [3]
>>> v
[[], [], [], [3, 3], [], [], [], [], [], []]

History
Date	User	Action	Args
2015-07-08 09:53:24	Bastiaan Albarda	set	recipients: + Bastiaan Albarda, zorceta, dechamps
2015-07-08 09:53:24	Bastiaan Albarda	set	messageid: <1436349204.33.0.219365485704.issue24589@psf.upfronthosting.co.za>
2015-07-08 09:53:24	Bastiaan Albarda	link	issue24589 messages
2015-07-08 09:53:24	Bastiaan Albarda	create