Use decorator with same name as an instance method

问题

I have the following snippet:

from decorators import before_save

class User(Model):
    def before_save(self):
        pass

    @before_save
    def meth(self):
        pass

It seems that when I try to decorate meth, it "uses" the instance method before_save, not the imported decorator. How can I still declare an instance method with the same name as a decorator and still be able to properly use both of them?

Shouldn't the decorator work as expected? How is it possible to refer to the before_save instance method just as before_save, without any reference to its class?

回答1:

You can try the following

import decorators
# omitted

@decorators.before_save
def meth(self):
    pass

I wanted to use a one-liner but run into this.

回答2:

You can change the import name:

from decorators import before_save as before_save_decorator

class User(Model):
    def before_save(self):
        pass

    @before_save_decorator
    def meth(self):
        pass

That should let you use both.

回答3:

Or you could define before_save method after:

from decorators import before_save

class User(Model):

    @before_save
    def meth(self):
        pass

    def before_save(self):
        pass

But this is not the best solution, because it's not obvious what's going on here, and you can forget about later.

来源：https://stackoverflow.com/questions/28994359/use-decorator-with-same-name-as-an-instance-method