如何在QLineEdit或gen的PyQt5中返回int

Question

self.queue = QLineEdit()
self.onlyint = QIntValidator()
vbox2.addWidget(self.queue)
self.queue.setValidator(self.onlyint)
self.queue.returnPressed.connect(self.OnPressed)

self.queuereturntext = QLabel()
vbox2.addWidget(self.queuereturntext)

def OnPressed(self):
    number = self.queue.text()
    self.queuereturntext.setText(number * 3 + " mins waiting time")

它不能给我想要的东西。如果输入3，则返回333分钟。我想要的是9分钟