python_如何在类中定义装饰器

#!/usr/bin/python3

import logging
from time import time, strftime, localtime, sleep
from random import choice
from functools import wraps


class ToLog():
    def __init__(self, name):
        log = logging.getLogger(name)
        log.setLevel(logging.INFO)
        # 日志保存文件名字
        file_name = logging.FileHandler(name + ‘.log‘)
        # 添加日志文件
        log.addHandler(file_name)
        # 日志格式
        log.info(‘start‘.center(50, ‘-‘))
        self.log = log
        self.temp = ‘%(func)s -> [%(start_time)s - %(used_time)s - %(naclls)s]‘
    
    def go_log(self, func):
        @wraps(func)
        def wrapper(*args, **kwargs):
            # 函数每调用一次加1
            wrapper.naclls += 1
            
            start_time = time()
            res = func(*args, **kwargs)
            used_time = time() - start_time
            
            info = {}
            info[‘func‘] = func.__name__
            info[‘start_time‘] = start_time
            info[‘used_time‘] = used_time
            info[‘naclls‘] = wrapper.naclls
            
            msg = self.temp % info
            # 把日志按格式写入文件
            self.log.info(msg)
            
            return res
        
        # 初始化调用次数参数
        wrapper.naclls = 0
        
        return wrapper
    
    # 重新定义日志记录模版
    def set_log_temp(self, temp):
        self.temp = temp

    # 关闭日志功能
    def log_off(self):
        self.log.setLevel(logging.WARN)
    
    # 打开日志功能
    def log_on(self):
        self.log.setLevel(logging.INFO)

# 实例化出两个装饰器对象
log_one = ToLog(‘one‘)
log_two = ToLog(‘two‘)

# 修改实例2的日志模版,去掉执行时间
log_two.set_log_temp(‘%(func)s -> [%(start_time)s - %(naclls)s]‘)

# 关闭log_two中记录日志功能
log_two.log_off()


@log_one.go_log
def func_one():
    print(‘one‘)
 
    
@log_one.go_log
def func_two():
    print(‘two‘)


@log_two.go_log
def func_three():
    print(‘three‘)


if __name__ == ‘__main__‘:
    for _ in range(50):
        choice([func_one, func_two, func_three])()
        sleep(choice([0.5, 1, 1.5]))