问Python tkinter - 通过按下按钮，从加载到文本小部件中的数据库中更改值

EN

class IssuesMCQ(tk.Frame):

def __init__(self, parent, controller):
    tk.Frame.__init__(self, parent)
    label = tk.Label(self, text="Welcome to the Issues MCQ Page.", font=LARGE_FONT)
    label.pack(pady=10,padx=10)
    #The "pady" command is to add external padding to the window on the y axis
    #The "padx" command is to add external padding to the window on the x axis
    connect = lite.connect("MCQ.db")#Tells the program what database to connect to
    c = connect.cursor()#Connects the program with the database and opens it
    T = Text(self, height=20, width=100)#Creates a Text Box to store the Mark Scheme in
    S = Scrollbar(self)#Creates A scrollbar to scroll through the Text Box
    MCQE = Entry(self)
    T.pack()#Packs the Text Box with the default Settings
    S.pack(side=RIGHT, fill=Y)
    #The Option "side=RIGHT" means the program will pack the scrollbar on the right hand side of the window
    #The Option "fill=Y" means that the program will make sure that the scrollbar will fill the window across the y axis
    MCQE.pack()
    S.config(command=T.yview)#Configures the Scrollbar telling the program what the scrollbar will control
    T.config(yscrollcommand=S.set)#Configures the Scrollbar telling it that the Scrollbar is set to move it
    global Question
    Question = 1
    c.execute("SELECT Question FROM Questions WHERE QuestionID= ?", (Question,))
    for i in c.fetchall():
        text = i[0]
        T.insert(END, text)

    button = ttk.Button(self, text="Check Your Answer",
                        command=lambda: CheckAnswers(MCQE, Question))

    button.pack()

    button1 = ttk.Button(self, text="Next Question",
                        command=lambda: NextQuestion())

    button1.pack()

    def CheckAnswers(MCQE, Question):
            connect = lite.connect("MCQ.db")#Tells the program what database to connect to
            c = connect.cursor()#Connects the program with the database and opens it
            Answer = MCQE.get()
            QCA = 1
            c.execute("SELECT CorrectAnswer FROM CorrectAnswers WHERE CAID= ?", (QCA,))
            for i in c.fetchall():
                    CA = i[0]
            if Answer == CA:
                    messagebox.showinfo("Checking Your Answer", "Your Answer is Correct")
            else:
                    messagebox.showerror("Checking Your Answer", "Your Answer is Incorrect")
            QCA = QCA + 1
    def NextQuestion():
            global Question
            Question = Question + 1