#装饰器的官方定义：
装饰器本质上是一个Python函数(其实就是闭包)，它可以让其他函数在不需要做任何代码变动的前提下增加额外功能，装饰器的返回值也是一个函数对象。装饰器用于有以下场景，比如:插入日志、性能测试、事务处理、缓存、权限校验等场景。

import unittest
#引入ddt库
from ddt import ddt,data,unpack
test_data = [{"name":"张三"},2]

@ddt#装饰测试类
class DemoCase(unittest.TestCase):
    @data(test_data)#装饰函数
    def test_jia(self,item):
        print(item)
    def test_jian(self):
        pass

if __name__ == '__main__':
    unittest.main()

运行结果：

plugins: html-3.2.0, metadata-2.0.4collected 2 items demo.py .[{'name': '张三'}, 2] . [100%] ============================== 2 passed in 0.04s ============================== Process finished with exit code 0

import unittest
#引入ddt库
from ddt import ddt,data,unpack
test_data = [{"name":"张三"},2]

@ddt#装饰测试类
class DemoCase(unittest.TestCase):
    @data(*test_data)#装饰函数，*test_data脱外套，根据脱外套后的数据执行次数
    def test_jia(self,item):
        print(item)

if __name__ == '__main__':
    unittest.main()

运行结果：
plugins: html-3.2.0, metadata-2.0.4collected 2 items
demo.py .{'name': '张三'}
.2                                                              [100%]
============================== 2 passed in 0.04s ==============================
Process finished with exit code 0

import unittest
#引入ddt库
from ddt import ddt,data,unpack
test_data = [[2,6],[9,1000]]

@ddt#装饰测试类
class DemoCase(unittest.TestCase):

    @data(*test_data)#装饰函数，*test_data脱外套，根据脱外套后的数据执行次数
    @unpack
    def test_jia(self,a,b):
        print("a: ",a)
        print("b: ",b)

if __name__ == '__main__':
    unittest.main()

运行结果：
plugins: html-3.2.0, metadata-2.0.4collected 2 items
demo.py 
.a:  2
b:  6
.a:  9
b:  1000                                                              [100%]
============================== 2 passed in 0.04s ==============================

import unittest
#引入ddt库
from ddt import ddt,data,unpack
from test01.doexcel import DoExcel

 DoExcel类代码

test_data = DoExcel("C:UsersAdministratorDesktoptestdemo.xlsx","s1").return_excel_value()#[{},{},{}]

@ddt#装饰测试类
class DemoCase(unittest.TestCase):

    @data(*test_data)#装饰函数，*test_data脱外套，根据脱外套后的数据执行次数
    def test_jia(self,item):
        print(item["method"],item["url"],item["data"],item["expect"])

if __name__ == '__main__':
    unittest.main()

执行结果：
plugins: html-3.2.0, metadata-2.0.4collected 2 items
demo.py .post http://www.qabujiaban.com/user/login {'username': 'uuuu222都44', 'password': 'WJHasb124*1'} 0000
.get http://www.qabujiaban.com/user/login {'username': 'uuuu222都44', 'password': 'WJHasb124*1'} 0000
                                                               [100%]
============================== 2 passed in 0.31s ==============================
Process finished with exit code 0