Implementing a class property that preserves the docstring

Question

I have a descriptor that turns a method into a property on the class level:

class classproperty(object):

    def __init__(self, getter):
        self.getter         


        

Answer 1

If you jump through a few hoops, it can be retrieved, but not directly through the property itself like A.test.__doc__ because of the way descriptors work.

class classproperty(object):
    def __init__(self, getter):
        self.getter = getter

    def __get__(self, instance, owner):
        if instance is None:  # instance attribute accessed on class?
            return self
        return self.getter(owner)

class A(object):
    @classproperty
    def test(cls):
        "test's docstring"
        return "Test"

def docstring(cls, methodname):
    return getattr(cls, methodname).getter.__doc__

print docstring(A, 'test')  # -> test's docstring