How to use the docstring in this property example

[Robert]

Hi,

I read below code snippet on link:
https://docs.python.org/2/library/functions.html#property

--------------
class C(object):
    def __init__(self):
        self._x = None

    def getx(self):
        return self._x

    def setx(self, value):
        self._x = value

    def delx(self):
        del self._x

    x = property(getx, setx, delx, "I'm the 'x' property.")
If c is an instance of C, c.x will invoke the getter, c.x = value will invoke the setter and del c.x the deleter.

If given, doc will be the docstring of the property attribute.
////////////////

I can use these:
c.x
c.x=42
del c.x

but I don't know how to get the doctring from the property attribute.
Could you show me how to do that?

Thanks,