列表是什么

name = ["jim", "lilei", "lucy"]     #方括号表示，逗号分隔print(name)print(name[0])print(name[0].title())

输出：

['jim', 'lilei', 'lucy']

jim

Jim

name = ["jim", "lilei", "lucy"]print(name[0], name[1], name[2])print(name[-1], name[-2], name[-3])   #-1索引表示最后一个元素

输出:

jim lilei lucy

lucy lilei jim

 

name = ["jim", "lilei", "lucy"]name[0] = 'lily'  #修改第一个元素print(name)#添加元素name.append('xiaoming')   #在末尾添加print(name)name.insert(1,'ouyangfeng')   #在name[1]处添加，原来的name[1]以及以后的后移print(name)del name[1]  #删除name[1]，以后不用name[1]了print(name)delete_end = name.pop()print(delete_end, name)delete_name = name.pop(1)  #删除name[1]，以后还可以用print("delete_name: ",delete_name)print(name)name.remove('lucy')  #删除lucyprint(name)

输出：

['lily', 'lilei', 'lucy']

['lily', 'lilei', 'lucy', 'xiaoming']

['lily', 'ouyangfeng', 'lilei', 'lucy', 'xiaoming']

['lily', 'lilei', 'lucy', 'xiaoming']

xiaoming ['lily', 'lilei', 'lucy']

delete_name:  lilei

['lily', 'lucy']

['lily']

 

永久排序：

cars =['dazhong','Baoma','aodi','qq','Qirui']cars.sort() #按字母从小到大print(cars)cars.sort(reverse=True)  #按字母从大到小print(cars)

 

output:

['Baoma', 'Qirui', 'aodi', 'dazhong', 'qq']

['qq', 'dazhong', 'aodi', 'Qirui', 'Baoma']

 

临时排序：

cars =['dazhong','Baoma','aodi','qq','Qirui']tmp_sort = sorted(cars)print("tmp_sort:",tmp_sort)print("origianl:",cars)print("large->small:",sorted(cars,reverse=True))print("origianl:",cars)

output:

tmp_sort: ['Baoma', 'Qirui', 'aodi', 'dazhong', 'qq']

origianl: ['dazhong', 'Baoma', 'aodi', 'qq', 'Qirui']

large->small: ['qq', 'dazhong', 'aodi', 'Qirui', 'Baoma']

origianl: ['dazhong', 'Baoma', 'aodi', 'qq', 'Qirui']

 

反转：

cars =['dazhong','Baoma','aodi','qq','Qirui']print(cars)cars.reverse()print(cars)cars.reverse()print("recover: ", cars)

output:

['dazhong', 'Baoma', 'aodi', 'qq', 'Qirui']

['Qirui', 'qq', 'aodi', 'Baoma', 'dazhong']

recover:  ['dazhong', 'Baoma', 'aodi', 'qq', 'Qirui']

cars =['dazhong','Baoma','aodi','qq','Qirui']length = len(cars)print(length)

output:

5