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    <p>Here's what I have so far. The only problem is that the pyqtSignal decorator seems to be getting something from the stack trace and there's no way that I know of to override that, which is a clear PyQt design flaw.</p> <pre><code>#!/usr/bin/env python from PyQt4.QtCore import * from PyQt4.QtGui import * from functools import wraps import signal import sys signal.signal(signal.SIGINT, signal.SIG_DFL) class SetAdder: def __init__(self): self.clear() def clear(self): self.value = set() def aggregate(self, other): send = not self.value self.sent = True self.value.add(other) return send # This class decorator adds nameSlot, nameAuxSignal, nameAuxSlot, and # name_manager. Signals should be connected to nameSlot. They will cause # the function 'name' to be called with aggregated values. def aggregated_slot_class_decorator(list_): def class_decorator(cls): for manager_type, name, *args in list_: signal_name = name + "AuxSignal" slot_a_name = name + "Slot" slot_b_name = name + "AuxSlot" manager_name = name + "_manager" def slot_a(self, *args_): manager = getattr(self, manager_name) if manager.aggregate(*args_): print("Sending") getattr(self, signal_name).emit() def slot_b(self): manager = getattr(self, manager_name) getattr(self, name)(manager.value) manager.clear() setattr(cls, slot_a_name, pyqtSlot(cls, *args, name=slot_a_name)(slot_a)) setattr(cls, slot_b_name, pyqtSlot(cls, name=slot_b_name)(slot_b)) orig_init = cls.__init__ def new_init(self, *args_, **kwargs): orig_init(self, *args_, **kwargs) getattr(self, signal_name).connect(getattr(self, slot_b_name), Qt.QueuedConnection) setattr(self, manager_name, manager_type()) cls.__init__ = new_init #setattr(cls, signal_name, pyqtSignal()) return cls return class_decorator @aggregated_slot_class_decorator([(SetAdder, 'test', int)]) class A(QObject): def __init__(self): super().__init__() testAuxSignal = pyqtSignal() def test(self, value): print("Received", value) class B(QObject): signal = pyqtSignal(int) a = A() b = B() b.signal.connect(a.testSlot) for i in range(10): b.signal.emit(i % 5) app = QApplication(sys.argv) sys.exit(app.exec_()) </code></pre> <p>Outputs:</p> <pre><code>Sending Received {0, 1, 2, 3, 4} </code></pre>
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