如何将按钮链接到QtGui中的文本框？

Question

我正在进行多项选择测验。我已经制作了带有问题的按钮和文本框以及带有可能答案的文本框。如何将按钮连接到答案以继续下一个问题？

这是我的代码：

from PySide import QtCore, QtGui

class  Ui_MainWindow(object):


       def setupUi(self, MainWindow):
        MainWindow.setObjectName("MainWindow")
        MainWindow.resize(400, 300)

        self.centralWidget = QtGui.QWidget(MainWindow)
        self.centralWidget.setObjectName("centralWidget")

        MainWindow.setCentralWidget(self.centralWidget)

        #Text Display Window
        self.textDisp = QtGui.QTextEdit(self.centralWidget)
        self.textDisp.setGeometry(QtCore.QRect(10, 10, 381, 71))
        self.textDisp.setReadOnly(True)
        self.textDisp.setObjectName("textDisp")
        self.textDisp.append('Question 1:')
        self.textDisp.append('What is ... ?')

        self.horizontalLayoutWidget = QtGui.QWidget(self.centralWidget)
        self.horizontalLayoutWidget.setGeometry(QtCore.QRect(10, 90, 171, 80))
        self.horizontalLayoutWidget.setObjectName("horizontalLayoutWidget")

        self.horizontalLayoutWidget = QtGui.QHBoxLayout(self.horizontalLayoutWidget)
        self.horizontalLayoutWidget.setContentsMargins(0, 0, 0, 0)
        self.horizontalLayoutWidget.setObjectName("horizontalLayout")

        self.textDisp2 = QtGui.QTextEdit(self.centralWidget)
        self.textDisp2.setGeometry(QtCore.QRect(10, 100, 381, 71))
        self.textDisp2.setReadOnly(True)
        self.textDisp2.setObjectName("textDisp2")
        self.textDisp2.append('A: ...')
        self.textDisp2.append('B: ...')
        self.textDisp2.append('C: ...')
        self.textDisp2.append('D: ...')

        self.horizontalLayoutWidget = QtGui.QWidget(self.centralWidget)
        self.horizontalLayoutWidget.setGeometry(QtCore.QRect(10, 90, 171, 80))
        self.horizontalLayoutWidget.setObjectName("horizontalLayoutWidget")

        self.horizontalLayoutWidget = QtGui.QHBoxLayout(self.horizontalLayoutWidget)
        self.horizontalLayoutWidget.setContentsMargins(0, 0, 0, 0)
        self.horizontalLayoutWidget.setObjectName("horizontalLayout")
##
##        self.verticalLayoutWidget = QtGui.QWidget(self.centralWidget)
##        self.verticalLayoutWidget.setGeometry(QtCore.QRect(10, 90, 171, 80))
##        self.verticalLayoutWidget.setObjectName("verticalLayoutWidget")
##
##        self.verticalLayoutWidget = QtGui.QHBoxLayout(self.verticalLayoutWidget)
##        self.verticalLayoutWidget.setContentsMargins(0, 0, 0, 0)
##        self.verticalLayoutWidget.setObjectName("verticalLayout")

##        #Label for Answer 1
##        self.ans1 = QtGui.QLabel()
##        self.ans1.setObjectName("answer1")
##        self.horizontalLayoutWidget.addWidget(self.ans1)
##
##        #Input for Answer 1
##        self.ans1Input = QtGui.QLineEdit()
##        self.ans1Input.setObjectName("answer1Input")
##        self.horizontalLayoutWidget.addWidget(self.ans1Input)

        self.horizontalLayoutWidget_2 = QtGui.QWidget(self.centralWidget)
        self.horizontalLayoutWidget_2.setGeometry(QtCore.QRect(219, 90, 171, 80))
        self.horizontalLayoutWidget_2.setObjectName("horizontalLayoutWidget_2")
        self.horizontalLayoutWidget_2 = QtGui.QHBoxLayout(self.horizontalLayoutWidget_2)
        self.horizontalLayoutWidget_2.setContentsMargins(0, 0, 0, 0)
        self.horizontalLayoutWidget_2.setObjectName("horizontalLayout_2")

##        #Label for Answer 2
##        self.answer2 = QtGui.QLabel()
##        self.answer2.setObjectName("number2")
##        self.horizontalLayoutWidget_2.addWidget(self.answer2)
##
##        #Input for Answer 2
##        self.ans2Input = QtGui.QLineEdit()
##        self.ans2Input.setObjectName("numb2Input")
##        self.horizontalLayoutWidget_2.addWidget(self.ans2Input)

        self.gridLayoutWidget = QtGui.QWidget(self.centralWidget)
        self.gridLayoutWidget.setGeometry(QtCore.QRect(9, 180, 381, 80))
        self.gridLayoutWidget.setObjectName("gridLayoutWidget")
        self.gridLayout = QtGui.QGridLayout(self.gridLayoutWidget)
        self.gridLayout.setContentsMargins(0, 0, 0, 0)
        self.gridLayout.setObjectName("gridLayout")

        #Button for Option A
        self.abtn = QtGui.QPushButton(self.gridLayoutWidget)
        self.abtn.setObjectName("abtn")
        self.gridLayout.addWidget(self.abtn, 0, 0, 1, 1)
        self.abtn.setText("A")

##        self.abtn.clicked.connect(self.)

        #Button for Option B
        self.bbtn = QtGui.QPushButton(self.gridLayoutWidget)
        self.bbtn.setObjectName("bbtn")
        self.gridLayout.addWidget(self.bbtn, 1, 0, 1, 1)
        self.bbtn.setText("B")

##        self.bbtn.clicked.connect(self.)

        #Button for Option C
        self.cbtn = QtGui.QPushButton(self.gridLayoutWidget)
        self.cbtn.setObjectName("cbtn")
        self.gridLayout.addWidget(self.cbtn, 0, 1, 1, 1)
        self.cbtn.setText("C")

##        self.cbtn.clicked.connect(self.)

        #Button for Option D
        self.dbtn = QtGui.QPushButton(self.gridLayoutWidget)
        self.dbtn.setObjectName("dbtn")
        self.gridLayout.addWidget(self.dbtn, 1, 1, 1, 1)
        self.dbtn.setText("D")

##        self.dbtn.clicked.connect(self.)





if __name__ == "__main__":
    import sys
    app = QtGui.QApplication(sys.argv)
    MainWindow = QtGui.QMainWindow()
    ui = Ui_MainWindow()
    ui.setupUi(MainWindow)
    MainWindow.show()
    sys.exit(app.exec_())