假设学生系统中数据为固定格式：(名字，年龄，性别，邮箱)
('jack','16','male','jack3001@gmail.com')
('eric','17','male','eric@qq.com')
('xander','16','female','lucy123@yahoo.com')方案一：
from enum import IntEnum
NAME,AGE,SEX,EMAIL=range(4)
s=('jim','16','male','jim8721@gmail.com')
# print(NAME) # 0
class StudentEnum(IntEnum):
NAME=0
AGE=1
SEX=2
EMAIL=3
print(s[StudentEnum.NAME]) # jim
print(isinstance(StudentEnum.NAME,int)) # True方案二：
from collections import namedtuple
Student=namedtuple('Student',['name','age','sex','email'])
s2=Student('jim','16','male','jim8721@gmail.com')
s3=Student('eric','16','male','eric3421@gmail.com')
print(s2) # Student(name='jim', age='16', sex='male', email='jim8721@gmail.com')
print(s3) # Student(name='eric', age='16', sex='male', email='eric3421@gmail.com')
