subclassing socket._socket

Hi,

I'm trying to subclass socket._socket in Pyrex, but I can't seem to
get ctypedefs and cimports right. How is it possible to do it? Is it a
good idea to do it, or using it as an object member would be easier?

from socket cimport _socket

cdef extern from "Modules/socketmodule.h":
    ctypedef class _socket.socket [object PySocketSockObject]:
        pass

cdef class evsocket(socket):
    pass

t.pyx:1:0: Cannot find .pxd file for module 'socket'
t.pyx:1:20: Name '_socket' not declared in module 'socket'

Thanks,

P=E9ter