带参数的装饰器？ [英] Decorators with parameters?

问题描述

我对装饰器转移变量 insurance_mode有疑问。我可以通过以下装饰器语句来做到这一点：

I have a problem with the transfer of variable 'insurance_mode' by the decorator. I would do it by the following decorator statement:

 @execute_complete_reservation(True)
 def test_booking_gta_object(self):
     self.test_select_gta_object()

但不幸的是，该语句不起作用。也许有更好的方法来解决这个问题。

but unfortunately, this statement does not work. Perhaps maybe there is better way to solve this problem.

def execute_complete_reservation(test_case,insurance_mode):
    def inner_function(self,*args,**kwargs):
        self.test_create_qsf_query()
        test_case(self,*args,**kwargs)
        self.test_select_room_option()
        if insurance_mode:
            self.test_accept_insurance_crosseling()
        else:
            self.test_decline_insurance_crosseling()
        self.test_configure_pax_details()
        self.test_configure_payer_details

    return inner_function

推荐答案

带参数的修饰符的语法有些不同-具有参数的装饰器应返回一个函数，该函数将接受一个函数并返回另一个函数。因此，它实际上应该返回一个普通的装饰器。有点混乱吧？我的意思是：

The syntax for decorators with arguments is a bit different - the decorator with arguments should return a function that will take a function and return another function. So it should really return a normal decorator. A bit confusing, right? What I mean is:

def decorator_factory(argument):
    def decorator(function):
        def wrapper(*args, **kwargs):
            funny_stuff()
            something_with_argument(argument)
            result = function(*args, **kwargs)
            more_funny_stuff()
            return result
        return wrapper
    return decorator

此处您可以阅读有关该主题的更多信息-可以使用可调用对象来实现这一点，这也在那里进行了解释。

Here you can read more on the subject - it's also possible to implement this using callable objects and that is also explained there.

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