我得到“TypeError：decorator_factory（）正好接受2个参数（给定1个）”

Question

为什么我在此处运行调用时遇到上述异常。我觉得我错过了一些非常明显的东西......

def decorator_factory(arg1, arg2):
    def simple_decorator(f):
        def wrapper():
              print arg1
              f()
              print arg2
    return wrapper
return decorator_factory

@decorator_factory("what the heck", "what the heck2")
def hello():
print "Hello World"

hello()

Answer 1

必须是return simple_decorator而不是return decorator_factory

def decorator_factory(arg1, arg2):
    def simple_decorator(f):
        def wrapper():
              print arg1
              f()
              print arg2
        return wrapper
    return simple_decorator # <--- HERE 

@decorator_factory("what the heck", "what the heck2")
def hello():
    print "Hello World"

hello()