内置函数和装饰器的进阶

# def wrapper1(func):
#     def inner1(*args,**kwargs):
#         print(‘in wrapper 1,before‘)
#         ret = func(*args,**kwargs)   #qqxing
#         print(‘in wrapper 1,after‘)
#         return ret
#     return inner1
#
# def wrapper2(func):     #inner1
#     def inner2(*args,**kwargs):
#         print(‘in wrapper 2,before‘)
#         ret = func(*args,**kwargs)   #inner1
#         print(‘in wrapper 2,after‘)
#         return ret
#     return inner2
#
# @wrapper2
# @wrapper1
# def qqxing():
#     print(‘qqxing‘)
# qqxing()      # 多装饰器同时作用时候，会先把调用函数传入离他最近的装饰器，然后该装饰器再传入上一级装饰器中

#
def f4(flag):
    def f2():
        def f3(func):
            def inner():
                print(‘123‘)
                func()
            return inner
        return f3
    return f2
a = f4(1)
@a()                      #语法糖最多三级，
def func():
    print(‘hahah‘)
func()
# 123
# hahah