在 2010-10-04一的 08:00 -0700，Richard Thomas写道：
> > >>> L=[1,2,3,4]
> > >>> L[3:1]
> > []
> > >>> print L
> > [1, 2, 3, 4]
> > >>> L[3:1]=['?']
> Chard.
thx for all,I know it ^^
thx
--
http://mail.python.org/mailman/listinfo/python-list
In
part III
how does Python handle it if you try to extract a sequence in reverse,
with the lower bound greater than the higher bound (e.g., L[3:1])? Hint:
try
assigning to this slice (L[3:1]=['?']), and see where the value is put.
>>> L=[1,2,3,4]
>>> L[3:1]
[]
>>> print L
[1, 2, 3, 4]
>>> L[3:
