Serhiy Storchaka <[email protected]> added the comment:
It cannot work this way.
atexit.register() as a function allows you to specify arguments which will be
passed to the registered function, but if it is used as a decorator, only one
argument (the function itself) is passed to atexit.register() (it is how
decorators work). When used as a decorator it can only register functions
without parameters.
On other hand, the function corresponding to a class method requires the class
argument. There is no magic to determine it at the decoration time, because the
class does not exist yet. It will be created only after the class definition
body be executed.
It is possible to create a decorator which work the way you want. The simplest
method perhaps to create a classmethod subclass with __set_name__() method.
__set_name__() will be called after creating the class.
class mydecorator(classmethod):
def __set_name__(self, type, name):
atexit.register(self.__func__, type)
class Program:
@mydecorator
def clean_up(cls):
...
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