(gdb) print callback
$1 = (PyObject *) 0xb7b7470c
(gdb) print args
$2 = (PyObject *) 0xb7b5886c
(gdb) print _PyObject_Dump(callback)
object  : <bound method Player.watch of <__main__.Player object at 0xb7b57cac>>
type    : instancemethod
refcount: 2
address : 0xb7b7470c
$3 = 59