更新时间:2022-06-14 06:23:16
您的装饰器实例没有 __name __
属性,因此Python与问号相关。
Your decorator instance has no __name__
attribute, so Python has to do with a question mark instead.
使用 functools.update_wrapper()
复制函数名称一些其他有趣的特殊属性(如docstring,函数模块名称以及函数可能具有的任何自定义属性):
Use functools.update_wrapper()
to copy over the function name, plus a few other interesting special attributes (such as the docstring, the function module name and any custom attributes the function may have):
import types
from functools import update_wrapper
class FooTestDecorator(object):
def __init__(self,func):
self.func=func
self.count=0
update_wrapper(self, func)
def __get__(self,obj,objtype=None):
return types.MethodType(self,obj,objtype)
def __call__(self,*args,**kwargs):
self.count+=1
return self.func(*args,**kwargs)
演示:
>>> f=Foo()
>>> print Foo.__dict__['test']
<__main__.FooTestDecorator object at 0x11077e210>
>>> print Foo.test
<unbound method Foo.test>
>>> print f.test
<bound method Foo.test of <__main__.Foo instance at 0x11077a830>>