元组中元组命名， 提高可读性

xiwulin = （"zhangsan", 18,    "男”， “1234567@.qq.com" )

1. 利用下表读取，可读性非常低

print(xiwulin[0])                                "zhangsan"
      print(xiwulin[1])                                18
      print(xiwulin[2])                                "男”

2. 定义数列值常量， 类似于枚举类型

name, age, sex, email = range(4)
    print(xiwulin[name])                                "zhangsan"
    print(xiwulin[age])                                18
    print(xiwulin[six])                                "男”
    
    if xiwulin[age] >= 18:
    ...
    if xiwulin[sex] == '男’:
      ...

3. 使用标准库中 collections . namedtuple 替代tuple
导入相应模块，namedtuple( “新创建子类名字”， 每个元素的名字）,可以利用属性获取相应的值

from   collections  import namedtuple
  students = namedtuple(students, [ "name",  "age",  "sex",  "email" ] ） 
  stu_info = students.（"zhangsan", 18,    "男”， “1234567@.qq.com" )
  
  print(s)
  s = student（name = "zhangsan", age = 18,   sex =  "男”， email = “1234567@.qq.com" )
  print(s.name)      "zhangsan"
  print(s.age)      18