def getNumbers(self):
    self.btn.name = self.sender().objectName()
    self.btn.text = self.sender().text()
    self.input_text += self.btn.text
    self.display.setText(self.input_text)
def getNumbers(self):
    self.btn.name = self.sender().objectName()
    self.btn.text = self.sender().text()
    self.input_text += self.btn.text
    self.display.setText(self.input_text)