How to transfer additional the data in kontrol and then it to consider in the event handler?

Question

Python

Python 2.7, PyQt4
I create controls in a loop:

water = QPixmap ("images//water.png")
for position in positions:
            label = QLabel()
            label.mousePressEvent = self.labelClicked
            label.setPixmap(water)
            label.setToolTip(str(position[0]) + str(position[1]))
            label.answer = position

    def labelClicked(self, event):
        sender = self.sender()
        a = sender.answer[0]
        self.setWindowTitle(str(a))

I'm trying to get the data of the pressed QLabel in the event. Before that, there was a subclassing
option that also does not work. The output in the debugger is None. Tried copying position via copy.copy(position).

Answer 1

Why didn't inheritance work for you?
Try this example using inheritance and signals:

from PyQt4 import QtGui, Qt


class MyLabel(QtGui.QLabel):
    clicked = Qt.pyqtSignal(str)

    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)

    def mousePressEvent(self, *args, **kwargs):
        self.clicked.emit(self.text())
        return QtGui.QLabel.mousePressEvent(self, *args, **kwargs)


class Main(QtGui.QWidget):

    def __init__(self):
        super().__init__()
        layout = QtGui.QVBoxLayout(self)
        for i in range(5):
            label = MyLabel(self, "Label " + str(i))
            label.clicked.connect(self.set_title)
            layout.addWidget(label)
        self.resize(300, 300)

    def set_title(self, label):
        self.setWindowTitle(label)

if __name__ == '__main__':
    app = Qt.QApplication([])
    m = Main()
    m.show()
    app.exec()