Terry J. Reedy <tjre...@udel.edu> added the comment: I happen to prefer del myself, but I agree that the two mutable sequence classes should behave the same. The manual 4.6.4 says
s[i:j:k] = t the elements of s[i:j:k] are replaced by those of t (1) 1. t must have the same length as the slice it is replacing. So the list behavior is not a bug. Extending its behavior is a feature request that could only happen in the 'next' release, now 3.3. It is not usually considered a bug for something to do something beyond what is promised; in any case, you are *not* requesting that bytearrays be restricted as lists are. But that could be the fix to remove the 'bug' of inconsistency. That also could not happen until a next release. Since deletion of contiguous slices works and since deletion of extended slices can work and since I found the restriction slightly surprising, I am in favor of extending list behavior unless there is some internal reason why it cannot be. The rationale for the restriction is that replacing a contiguous slice with a different number of items makes sense but replacing non-contiguous items with a different number does not -- except in the special case where the number is 0. So what you are really asking is that the footnote be changed to 1. t must have the same length as the slice it is replacing or be empty That is the current behavior of bytearrays. ---------- nosy: +terry.reedy stage: -> test needed type: behavior -> feature request versions: +Python 3.3 -Python 3.1 _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue12606> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
