explorer.py 文件源码

def watchObject(self, object, identifier, callback):
        """Watch the given object.

        Whenever I think the object might have changed, I'll send an
        ObjectLink of it to the callback.

        The identifier argument is used to generate identifiers for
        objects which are members of this one.
        """
        if type(object) is not types.InstanceType:
            raise TypeError, "Sorry, can only place a watch on Instances."

        # uninstallers = []

        dct = {}
        reflect.addMethodNamesToDict(object.__class__, dct, '')
        for k in object.__dict__.keys():
            dct[k] = 1

        members = dct.keys()

        clazzNS = {}
        clazz = new.classobj('Watching%s%X' %
                             (object.__class__.__name__, id(object)),
                             (_MonkeysSetattrMixin, object.__class__,),
                             clazzNS)

        clazzNS['_watchEmitChanged'] = new.instancemethod(
            lambda slf, i=identifier, b=self, cb=callback:
            cb(b.browseObject(slf, i)),
            None, clazz)

        # orig_class = object.__class__
        object.__class__ = clazz

        for name in members:
            m = getattr(object, name)
            # Only hook bound methods.
            if ((type(m) is types.MethodType)
                and (m.im_self is not None)):
                # What's the use of putting watch monkeys on methods
                # in addition to __setattr__?  Well, um, uh, if the
                # methods modify their attributes (i.e. add a key to
                # a dictionary) instead of [re]setting them, then
                # we wouldn't know about it unless we did this.
                # (Is that convincing?)

                monkey = _WatchMonkey(object)
                monkey.install(name)
                # uninstallers.append(monkey.uninstall)

        # XXX: This probably prevents these objects from ever having a
        # zero refcount.  Leak, Leak!
        ## self.watchUninstallers[object] = uninstallers