03 Custom Signal 만들기 : pyqtSignal or Signal

How to not shoot yourself in the foot with Python for Qt PyQt python signal slot So idle works as expected When I send real messages I can see that the signal is emitted properly, the slot is called properly But after a python signal slot The signal can be connected to a slot , which needs to be Python callable (in other words, a method or a class, anything implementing the __call

python slot You'll need to do two things before building the signalslot connection: Verify that activeLayer() is in fact returning a QgsMapLayer