Python List列表的操作说明

Python中List的N种操作，其简单程度令人叹为观止...

C:\Users\rhys>python
Python 2.7.14 (v2.7.14:84471935ed, Sep 16 2017, 20:19:30) [MSC v.1500 32 bit (Intel)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> listOne
[1, 3, 5, 7, 9] #1、赋值
>>> listTwo
[10, 4, 8, 6]
>>> listTotal = listOne+listTwo #2、合并
>>> listTotal
[1, 3, 5, 7, 9, 10, 4, 8, 6]
>>> listOne.extend(listTwo) #3、将listTwo并入listOne
>>> print(listOne)
[1, 3, 5, 7, 9, 10, 4, 8, 6]
>>> listTotal.append(2) #4、增加元素
>>> listTotal.sort() #5、排序
>>> listTotal
[1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
>>> listTotal[7] #6、根据序号寻找元素
8
>>> listTotal.index(5)#7、根据元素返回索引
4
>>> del(listTotal[9]) #8、删除元素
>>> listTotal[10]=10
>>> listTotal.append(10)
>>> listTotal
[1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
>>> len(listTotal) #9、返回长度
10
>>> 2 in listTotal #10、是否有某元素
True
>>> y=[1]*4 #11、复制元素
>>> y
[1, 1, 1, 1]
>>>

续：

>>> listTotal=[1,2,3,4,5,6,7,8,9,10]
>>> listTotal[-1] #使用负数索引来表示，导数第n个元素
10
>>> listTotal[-2]
9
>>> listTotal[3:] #使用index1:index2，来表示从两个索引之间的子集
[4, 5, 6, 7, 8, 9, 10]
>>> listTotal[-3:]
[8, 9, 10]
>>> mySubList = listTotal[-5:]
>>> mySubList
[6, 7, 8, 9, 10]
>>> listTotal[-8:-3]
[3, 4, 5, 6, 7]
>>> listTotal[:-3]
[1, 2, 3, 4, 5, 6, 7]