Since we're talking about class decorators, I have a question about
function and instancemethod objects. The following code works
class Root(object):
def index(self):
return "Hello World!"
index.exposed = True
but this code
class Root(object):
def index(self):
return "Hello World!"
index.exposed = True
gives the following exception
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
AttributeError: 'instancemethod' object has no attribute 'exposed'
I can tell that instancemethods can't have attributes added to
them outside of their class definition. Is this part of the Python
language spec, or just an implementation detail of CPython?
I
bring this up here because it makes writing certain class decorators
much more annoying. For example, if I want to write a class decorator
that will set "exposed=True" for every method of a class, I must resort
to shenanigans.
- Eli