pyqt5中的变量范围

Question

我在pyqt5中有一个这样的类，它以timhoursa作为全局变量

from PyQt5 import QtCore, QtGui, QtWidgets

class Ui_MainWindow(object):
    timhoursa=0
    def setupUi(self, MainWindow):            
        MainWindow.setObjectName("MainWindow")
        MainWindow.resize(800, 600)
        self.centralwidget = QtWidgets.QWidget(MainWindow)
        self.centralwidget.setObjectName("centralwidget")
        self.tableView = QtWidgets.QTableView(self.centralwidget)
        self.tableView.setGeometry(QtCore.QRect(25, 81, 761, 471))
        self.tableView.setObjectName("tableView")
        self.widget = QtWidgets.QWidget(self.centralwidget)
        self.widget.setGeometry(QtCore.QRect(100, 40, 300, 25))
        self.widget.setObjectName("widget")
        self.gridLayout = QtWidgets.QGridLayout(self.widget)
        self.gridLayout.setContentsMargins(0, 0, 0, 0)
        self.gridLayout.setObjectName("gridLayout")
        self.horizontalLayout = QtWidgets.QHBoxLayout()
        self.horizontalLayout.setObjectName("horizontalLayout")
        self.label = QtWidgets.QLabel(self.widget)
        self.label.setObjectName("label")
        self.horizontalLayout.addWidget(self.label)
        self.dateEdit = QtWidgets.QDateEdit(self.widget)
        self.dateEdit.setObjectName("dateEdit")
        self.horizontalLayout.addWidget(self.dateEdit)
        self.label_2 = QtWidgets.QLabel(self.widget)
        self.label_2.setObjectName("label_2")
        self.horizontalLayout.addWidget(self.label_2)
        self.timeEdit = QtWidgets.QTimeEdit(self.widget)
        self.timeEdit.setObjectName("timeEdit")
        self.horizontalLayout.addWidget(self.timeEdit)
        self.gridLayout.addLayout(self.horizontalLayout, 0, 0, 1, 1)
        self.pushButton = QtWidgets.QPushButton(self.widget)
        self.pushButton.setObjectName("pushButton")
        self.gridLayout.addWidget(self.pushButton, 0, 1, 1, 1)
        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.label.setText(_translate("MainWindow", "Date"))
        self.label_2.setText(_translate("MainWindow", "Time"))
        self.pushButton.setText(_translate("MainWindow", "Create Chart"))
        self.pushButton.clicked.connect(self.btn_clk)
        #self.timeEdit.changeEvent.connect
        self.timeEdit.timeChanged.connect(self.storedata)

当在timedit模块中更改时间时，我想选择该时间更改并将其存储在变量中，以便我可以访问与该类无关的其他函数，因此在上面的代码中添加了此功能

def storedata(self):
    timhoursa = self.timeEdit.time().toString("hh")
    return timhoursa

但是当我尝试打印timhoursa时，出现以下错误

NameError: name 'timhoursa' is not defined

我可以看到这是一个示波器问题，但无法解决，我在这里遗漏了什么