有关索引操作的代码实现：

# 将以数指定年月日的日期打印出来

months = ['Feb','Jan','Mar','apr','May','jun','july','Aug','sep','Oct','Nov','Dec']

# 列表：包含数 1-31 的结尾

endings = ['st','nd','rd'] +17*['th']+['st','nd','rd']+7*['th']+['st']

year =input('year : ')

month =input('Month(1-12): ')

day =input('Day(1-31): ')

month_number =int(month)

day_number =int(day)

# 索引取值

month_name = months[month_number-1]

ordinal = day + endings[day_number-1]

print(month_name +' '+ ordinal +','+ year)

提取输入的ＵＲＬ的域名

#提取特定格式的域名

url =input('plkease enter the url: ')

domin = url[11:-4]

print('Domin name '+domin)

序列成员登陆检验（检查用户名密码是否正确）

# 登陆用户名的缩小版

database = [['a','123'],['b','1234'],['c','12345']]

username =input('username :　')

pin =input('password : ')

if[username,pin]in database:

print("access granted")

else:

print("retry")