问题
I have a decorator in PY. It is a method and takes the function as a parameter. I want to create a directory structure based based on the passed function. I am using the module name for the parent directory but would like to use the classname for a subdirectory. I can't figure out how to get the name of the class that owns the fn object.
My Decorator:
def specialTest(fn):
filename = fn.__name__
directory = fn.__module__
subdirectory = fn.__class__.__name__ #WHERE DO I GET THIS
回答1:
If fn
is an instancemethod
, then you can use fn.im_class
.
>>> class Foo(object): ... def bar(self): ... pass ... >>> Foo.bar.im_class __main__.Foo
Note that this will not work from a decorator, because a function is only transformed into an instance method after the class is defined (ie, if @specialTest
was used to decorate bar
, it would not work; if it's even possible, doing it at that point would have to be done by inspecting the call stack or something equally unhappy).
回答2:
In Python 2 you can use im_class
attribute on the method object. In Python 3, it'll be __self__.__class__
(or type(method.__self__)
).
来源:https://stackoverflow.com/questions/7680446/get-python-functions-owning-class-from-decorator