# Python's list slice syntax can be used without indices# for a few fun and useful things:# You can clear all elements from a list:>>> lst = [1, 2, 3, 4, 5]>>> del lst[:]>>> lst[]# You can replace all elements of a list# without creating a new list object:>>> a = lst>>> lst[:] = [7, 8, 9]>>> lst[7, 8, 9]>>> a[7, 8, 9]>>> a is lstTrue# You can also create a (shallow) copy of a list:>>> b = lst[:]>>> b[7, 8, 9]>>> b is lstFalse