css', 'js', 'html', 'node']
In [36]: arr[2:4]=['pc','wd']
In [37]: arr
Out[37]: ['c', 'python', 'pc'..., 'wd', 'html', 'node']
9.切片的赋值功能可以插模拟入和删除元素
In [39]: arr
Out[39]: ['c', 'python', 'pc', 'wd', 'html'..., 'node']
In [40]: arr[1:1]= ['pc','wd']
In [41]: arr
Out[41]: ['c', 'pc', 'wd', 'python', 'pc', 'wd'..., 'html', 'node']
In [42]: arr[2:3]= []
In [43]: arr
Out[43]: ['c', 'pc', 'python', 'pc', 'wd', 'html...', 'node']
10.append 向list 最后追加元素
In [44]: arr= ['wd','woniu','lp']
In [45]: arr.append('suiji')
In [