property names

# This is the "normal" way
class C(object):
    def __init__(self):
        self._x = None
    @property
    def x(self):
        return self._x
    @x.setter # will copy C.x and add the setter
    def x(self, value):
        self._x = value
    @x.deleter # will copy the new C.x and add the deleter
    def x(self):
        del self._x

# This is an history preserving way
class C(object):
    def __init__(self):
        self._x = None
    @property
    def get_x(self):
        return self._x
    @get_x.setter # will copy C.get_x and add the setter
    def set_x(self, value):
        self._x = value
    @set_x.deleter # will copy C.set_x and add the deleter
    def x(self): # The last name is the one we will use
        del self._x

So, long story short, what really happens in the code is that every @x.[setter|setter|deleter] makes a copy of the referred property and plugs it in the new name.

https://gist.github.com/naufraghi/6070273

http://svn.python.org/view/python/trunk/Objects/descrobject.c?view=markup#l1211

What I miss is why a copy is done instead of modifying the first defined property.