The Signal class provides a way to declare and connect Qt signals in a pythonic way.
PySide adopt PyQt’s new signal and slot syntax as-is. The PySide implementation is functionally compatible with the PyQt 4.5 one, with the exceptions listed bellow.
Create a connection between this signal and a receiver, the receiver can be a Python callable, a Slot or a Signal.
Disconnect this signal from a receiver, the receiver can be a Python callable, a Slot or a Signal.
args is the arguments to pass to any connected slots, if any.