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  • python 很久以前的笔记保存

    批量替换请求头
    
    (.*?):(.*)
    '$1':'$2',
    
    
    
    # 用法
    #*kwargs
      demo(a=(Exception, RequestHandler), name={"age": "12"})
      
      demo(**kwargs):
         #结果为 a name
         print(*kwargs)
    
    
    #调用父类方式
      def _handle_request_exception(self, e: BaseException) -> None:
           super(RequestHandler, self)._handle_request_exception(e)
    
    
    #prefix 前缀
    #
    class Demo(object):
        def __init__(self):
            self._a = None
            self._x = None
    
        @property
        def a(self):
            return self._a
    
        @a.setter
        def a(self, value):
            self._a = value
    
        def setx(self, value):
            self._x = value
    
        def getx(self):
            return self._x
    
        x = property(fset=setx, fget=getx, doc='this is x')
    
    property(set_func,get_func,...)
    
    
    
    
    
    from functools import wraps
    @wraps() #保证传递进来的函数名字及__name__ 为自身方法名
    
    
    
    
    import traceback
    
    try:
        c = 1 / 0
    except Exception as e:
        #将异常以字符串形式打印出来
        print(traceback.format_exc())
    
    
    
    
    #线程池
    import time
    from concurrent.futures import ThreadPoolExecutor
    
    
    def ceshi(times):
        time.sleep(times)
        print(f"等{times}秒")
        return times
    
    
    executor = ThreadPoolExecutor(max_workers=10)
    task1 = executor.submit(ceshi, (2,))
    task2 = executor.submit(ceshi, (3,))
    task3 = executor.submit(ceshi, (1,))
    
    
    
    # 执行顺序 warps(前0.5) ----> wraps01(前0.5)----->demo----->wraps01(后0.5)-------->warps(后0.5) !!!!!!
    
    def wraps(name):
        print('----A-----')
    
        def wraps01(*args, **kwargs):
            print('----A1-----')
            name(*args, **kwargs)
            print('----A2-----')
    
        return wraps01
    
    
    def wraps_a(name):
        print('----B-----')
        def wraps_b(*args, **kwargs):
            print('----B1-----')
            name(*args, **kwargs)
            print('----B2-----')
        return wraps_b
    
    
    @wraps
    @wraps_a
    def demo():
        print('1234')
    
    
    demo()
    """
    ----B-----
    ----A-----
    ----A1-----
    ----B1-----
    1234
    ----B2-----
    ----A2-----
    """


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  • 原文地址:https://www.cnblogs.com/ls1997/p/11757715.html
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