python 装饰器在类中的使用

示例：

# encoding="utf-8"

import os
import time
from functools import wraps


class Demo(objecct):
    def __init__(self):
        pass

    def print_run_time(func):
        @wraps(func)
        def wrapper(self, *args, **kw):
            start_time = time.time()
            result = func(self, *args, **kw)
            end_time = time.time()
            # print("函数的运行时间(s)：{}".format(end_time - start_time))
            self.write_to_file.info_to_file("函数的运行时间(s)：{}".format(end_time - start_time))
            # print("函数的运行时间(ms)：{}".format(float(end_time - start_time) * 1000.0))
            self.write_to_file.info_to_file("函数的运行时间(ms)：{}".format(float(end_time - start_time) * 1000.0))
            return result

        return wrapper
    
    @print_run_time
    def add_sum(self, a, b):
        sum = a + b
        return sum

   
Demo().add_sum(10, 20)