Значение из doubleSpinBox или SpinBox

import sys
from PyQt5 import QtCore, QtGui, QtWidgets
 
 
from PyQt5 import QtCore, QtGui, QtWidgets
 
 
class Ui_MainWindow(object):
    def setupUi(self, MainWindow):
        MainWindow.setObjectName("MainWindow")
        MainWindow.resize(800, 600)
        self.centralwidget = QtWidgets.QWidget(MainWindow)
        self.centralwidget.setObjectName("centralwidget")
        self.doubleSpinBox = QtWidgets.QDoubleSpinBox(self.centralwidget)
        self.doubleSpinBox.setGeometry(QtCore.QRect(160, 80, 181, 131))
        self.doubleSpinBox.setObjectName("doubleSpinBox")
        self.pushButton = QtWidgets.QPushButton(self.centralwidget)
        self.pushButton.setGeometry(QtCore.QRect(164, 270, 421, 91))
        font = QtGui.QFont()
        font.setPointSize(20)
        self.pushButton.setFont(font)
        self.pushButton.setObjectName("pushButton")
        self.label = QtWidgets.QLabel(self.centralwidget)
        self.label.setGeometry(QtCore.QRect(180, 400, 401, 101))
        font = QtGui.QFont()
        font.setPointSize(25)
        self.label.setFont(font)
        self.label.setAlignment(QtCore.Qt.AlignCenter)
        self.label.setObjectName("label")
        self.doubleSpinBox_2 = QtWidgets.QDoubleSpinBox(self.centralwidget)
        self.doubleSpinBox_2.setGeometry(QtCore.QRect(400, 80, 181, 131))
        self.doubleSpinBox_2.setObjectName("doubleSpinBox_2")
        MainWindow.setCentralWidget(self.centralwidget)
        self.menubar = QtWidgets.QMenuBar(MainWindow)
        self.menubar.setGeometry(QtCore.QRect(0, 0, 800, 21))
        self.menubar.setObjectName("menubar")
        MainWindow.setMenuBar(self.menubar)
        self.statusbar = QtWidgets.QStatusBar(MainWindow)
        self.statusbar.setObjectName("statusbar")
        MainWindow.setStatusBar(self.statusbar)
 
        self.retranslateUi(MainWindow)
        QtCore.QMetaObject.connectSlotsByName(MainWindow)
 
    def retranslateUi(self, MainWindow):
        _translate = QtCore.QCoreApplication.translate
        MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow"))
        self.pushButton.setText(_translate("MainWindow", "Сложить"))
        self.label.setText(_translate("MainWindow", "Ответ"))
 
 
class MyWin(QtWidgets.QMainWindow):
 
    def __init__(self, parent=None):
        QtWidgets.QWidget.__init__(self, parent)
        self.ui = Ui_MainWindow()
        self.ui.setupUi(self)
        self.ui.pushButton.clicked.connect(self.btnClicked)
 
    def btnClicked(self):
        self.B = self.doubleSpinBox.value()
        self.A = self.doubleSpinBox_2.value()
        self.ui.label.setText(self.A+self.B)
 
if __name__ == "__main__":
    app = QtWidgets.QApplication(sys.argv)
    myapp = MyWin()
    myapp.show()
    sys.exit(app.exec_())