- >>> s = [1,2,3]
- >>> x = 5
- >>> s[len(s):len(s)] = [x] # (1)
>>> s
[1, 2, 3, 5]
When you did s[len(s):len(s)] you got the slice begining at len(s) with end at len(s) - 1, ie, nothing.
At step (1), len(s) = 3, so you did s[3:3] = [x]. It meant that the slice starting at index 3 (ie, just after s' end) is (now) the list [x].
When you did it again, you got slice s[4:4], which is empty.
Ah, didn't realize I was doing it again.
Thanks very much!
Dick
_______________________________________________ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
