Message 341618 - Python tracker

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Author	mblahay
Recipients	mblahay, r.david.murray, rhettinger, serhiy.storchaka, staticshock, vaultah
Date	2019-05-06.19:30:41
SpamBayes Score	-1.0
Marked as misclassified	Yes
Message-id	<1557171041.22.0.375473054804.issue27639@roundup.psfhosted.org>
In-reply-to

Content
Here is a test that more explicitly shows the problem. >>> from collections import UserList >>> UserList([0,1,2,3,4,5])[0:2].__class__ <class 'list'> >>> It can clearly be seen here that the return type of the slicing operator is list when it should, in this case, be UserList (or whatever class one is using that is derived from UserList).

Here is a test that more explicitly shows the problem. 

>>> from collections import UserList
>>> UserList([0,1,2,3,4,5])[0:2].__class__
<class 'list'>
>>> 

It can clearly be seen here that the return type of the slicing operator is list when it should, in this case, be UserList (or whatever class one is using that is derived from UserList).

History
Date	User	Action	Args
2019-05-06 19:30:41	mblahay	set	recipients: + mblahay, rhettinger, r.david.murray, serhiy.storchaka, vaultah, staticshock
2019-05-06 19:30:41	mblahay	set	messageid: <1557171041.22.0.375473054804.issue27639@roundup.psfhosted.org>
2019-05-06 19:30:41	mblahay	link	issue27639 messages
2019-05-06 19:30:41	mblahay	create