Заказ в Макдональдсе

from PyQt5.QtWidgets import QMainWindow, QApplication
from sys import argv, exit
from PyQt5 import QtCore, QtGui, QtWidgets
from functools import partial
 
 
class Ui_MainWindow(object):
    def setupUi(self, MainWindow):
        MainWindow.setObjectName("MainWindow")
        MainWindow.resize(213, 180)
        self.centralwidget = QtWidgets.QWidget(MainWindow)
        self.centralwidget.setObjectName("centralwidget")
        self.firstdish = QtWidgets.QCheckBox(self.centralwidget)
        self.firstdish.setGeometry(QtCore.QRect(10, 10, 81, 17))
        self.firstdish.setObjectName("firstdish")
        self.seconddish = QtWidgets.QCheckBox(self.centralwidget)
        self.seconddish.setGeometry(QtCore.QRect(10, 30, 81, 17))
        self.seconddish.setObjectName("seconddish")
        self.thirddish = QtWidgets.QCheckBox(self.centralwidget)
        self.thirddish.setGeometry(QtCore.QRect(10, 50, 101, 17))
        self.thirddish.setObjectName("thirddish")
        self.forthdish = QtWidgets.QCheckBox(self.centralwidget)
        self.forthdish.setGeometry(QtCore.QRect(10, 70, 121, 17))
        self.forthdish.setObjectName("forthdish")
        self.sixthdish = QtWidgets.QCheckBox(self.centralwidget)
        self.sixthdish.setGeometry(QtCore.QRect(10, 110, 91, 17))
        self.sixthdish.setObjectName("sixthdish")
        self.fifthdish = QtWidgets.QCheckBox(self.centralwidget)
        self.fifthdish.setGeometry(QtCore.QRect(10, 90, 91, 17))
        self.fifthdish.setObjectName("fifthdish")
        self.seventhdish = QtWidgets.QCheckBox(self.centralwidget)
        self.seventhdish.setGeometry(QtCore.QRect(10, 130, 81, 17))
        self.seventhdish.setObjectName("seventhdish")
        self.order = QtWidgets.QPushButton(self.centralwidget)
        self.order.setGeometry(QtCore.QRect(130, 140, 75, 21))
        self.order.setObjectName("order")
        MainWindow.setCentralWidget(self.centralwidget)
        self.menubar = QtWidgets.QMenuBar(MainWindow)
        self.menubar.setGeometry(QtCore.QRect(0, 0, 213, 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", "Заказ"))
        self.firstdish.setText(_translate("MainWindow", "Роял Бекон"))
        self.seconddish.setText(_translate("MainWindow", "Чизбургер"))
        self.thirddish.setText(_translate("MainWindow", "Филе - О - Фиш"))
        self.forthdish.setText(_translate("MainWindow", "Пирожок с вишней"))
        self.sixthdish.setText(_translate("MainWindow", "Чикенбургер"))
        self.fifthdish.setText(_translate("MainWindow", "Гриль Гурме"))
        self.seventhdish.setText(_translate("MainWindow", "Биг Тейсти"))
        self.order.setText(_translate("MainWindow", "Заказать"))
 
 
class Main(QMainWindow, Ui_MainWindow):
    def __init__(self):
        super().__init__()
        self.setupUi(self)
        self.z = []
 
        self.dialog = QMainWindow(self)
        self.dialog.setWindowTitle(QtCore.QCoreApplication.translate("self.dialog", "Чек"))
        self.dialog.setObjectName("SecondWindow")
        self.dialog.resize(213, 180)
        self.centralwidget = QtWidgets.QWidget(self.dialog)
        self.centralwidget.setObjectName("centralwidget")
        self.label = QtWidgets.QLabel(self.centralwidget)
        self.label.setEnabled(True)
        self.label.setGeometry(QtCore.QRect(0, 0, 211, 211))
        font = QtGui.QFont()
        font.setPointSize(9)
        font.setKerning(True)
        self.label.setFont(font)
        self.label.setContextMenuPolicy(QtCore.Qt.NoContextMenu)
        self.label.setText("")
        self.label.setAlignment(QtCore.Qt.AlignLeading | QtCore.Qt.AlignLeft | QtCore.Qt.AlignTop)
        self.label.setIndent(6)
        self.label.setObjectName("label")
        self.dialog.setCentralWidget(self.centralwidget)
        self.statusbar = QtWidgets.QStatusBar(self.dialog)
        self.statusbar.setObjectName("statusbar")
        self.dialog.setStatusBar(self.statusbar)
 
        self.firstdish.clicked.connect(partial(self.bill, 'Роял Бекон'))
        self.seconddish.clicked.connect(partial(self.bill, 'Чизбургер'))
        self.thirddish.clicked.connect(partial(self.bill, 'Филе - О - Фиш'))
        self.forthdish.clicked.connect(partial(self.bill, 'Пирожок с вишней'))
        self.fifthdish.clicked.connect(partial(self.bill, 'Чикенбургер'))
        self.sixthdish.clicked.connect(partial(self.bill, 'Гриль Гурме'))
        self.seventhdish.clicked.connect(partial(self.bill, 'Гриль Биг Тейсти'))
        self.order.clicked.connect(self.vivod)
 
    def bill(self, text):
        self.z.append(text)
 
    def vivod(self):
 
        if len(self.z) != 0:
            self.label.setText(';\n'.join(self.z))
        else:
            self.label.setText('Вы ничего не заказали!')
 
        self.dialog.show()
        self.z = []
 
 
if __name__ == '__main__':
    app = QApplication(argv)
    ex = Main()
    ex.show()
    exit(app.exec())