Message 385189 - Python tracker

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Author	serhiy.storchaka
Recipients	nemeskeyd, serhiy.storchaka, steven.daprano
Date	2021-01-18.11:06:10
SpamBayes Score	-1.0
Marked as misclassified	Yes
Message-id	<1610967970.27.0.590640004222.issue42956@roundup.psfhosted.org>
In-reply-to

Content
> s.start or 0 Why 0? start=None is not the same as start=0 in slice. For example: >>> 'abcdefgh'[slice(None, 3, -1)] 'hgfe' >>> 'abcdefgh'[slice(0, 3, -1)] '' Slices and range objects are very different in many ways. It depends on your application how do you convert a slice to a range object, and in general case it does not make sense. Just use the way that is appropriate in your application.

> s.start or 0

Why 0? start=None is not the same as start=0 in slice. For example:

>>> 'abcdefgh'[slice(None, 3, -1)]
'hgfe'
>>> 'abcdefgh'[slice(0, 3, -1)]
''

Slices and range objects are very different in many ways. It depends on your application how do you convert a slice to a range object, and in general case it does not make sense. Just use the way that is appropriate in your application.

History
Date	User	Action	Args
2021-01-18 11:06:10	serhiy.storchaka	set	recipients: + serhiy.storchaka, steven.daprano, nemeskeyd
2021-01-18 11:06:10	serhiy.storchaka	set	messageid: <1610967970.27.0.590640004222.issue42956@roundup.psfhosted.org>
2021-01-18 11:06:10	serhiy.storchaka	link	issue42956 messages
2021-01-18 11:06:10	serhiy.storchaka	create