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-----
"""