如何在PyGObject中实现信号的累加器？

import gi
gi.require_version('Gtk', '3.0')
from gi.repository import GObject

class MySignal(GObject.Signal):
    def __init__(self):
        GObject.Signal.__init__(self, arg_types=[int], return_type=int)

import gi
gi.require_version('Gtk', '3.0')
from gi.repository import GObject

class MyClass(GObject.Object):
    my_signal = MySignal()

    def __init__(self):
        GObject.Object.__init__(self)
        self.my_signal.connect(self.on_my_signal)

    def on_my_signal(self, obj, value):
        # 处理信号的累加逻辑
        # ...

    def emit_my_signal(self, value):
        self.my_signal.emit(self, value)

my_object = MyClass()
my_object.emit_my_signal(10)