Emitting unknown number of args to pyqtSignal

Question

I want to emit unknown number of argument to a pyqtSignal

E.g. when passing unknown args to a def:-

def oPrint(*args):
    print(args)

I want to do the same with pyqtSignal. Ie:-

class UI(QMainWindow):
    msgSig = pyqtSignal(*object) #this gives error

Answer 1

TL; DR; Qt needs to know the number of arguments so your requirement cannot be fulfilled.

---

A workaround is to use some container as a list or tuple.

class UI(QMainWindow):
    msgSig = pyqtSignal(list)

ui = Ui()
l = [1, "2", 3, "4"]
ui.msgSig.emit(l)

def oPrint(args):
    print(args)