我的程序是一个数学测验。通过从文本文件（questiontest.txt）中随机选择问题来解决问题。我希望我的代码生成一次以上的测验，除了显示之外，它确实这样做。即使实际问题和所需答案已更改，显示的问题也不会与选择的第一个问题相同，因此不会显示新问题。
这是代码：
from tkinter import *
import tkinter as tk
import random
title_font= ("Microsoft Jhenghei UI Light", 35)
class MathsApp(tk.Tk):
def __init__(self, *args, **kwargs):
tk.Tk.__init__(self, *args, **kwargs)
container = tk.Frame(self)
container.pack(side="top", fill="both", expand= True)
container.grid_rowconfigure(0, weight=1)
container.grid_columnconfigure(0, weight=1)
self.title("Maths Revision App")
self.geometry("800x500")
self.frames = {}
for F in (StartPage, q1, q2, q3, q4, q5, resultPage):
frame = F(container, self)
self.frames[F] = frame
frame.grid(row=0, column=0, sticky="nsew")
self.show_frame(StartPage)
def show_frame(self, cont):
#funtion that displays different pages
frame = self.frames[cont]
frame.tkraise()
class StartPage(tk.Frame):
def __init__(self, parent, controller):
tk.Frame.__init__(self,parent)
self.configure(bg ="white")
lbl = tk.Label(self, text="Welcome!", font=title_font, bg="white", fg="#004d99")
lbl.place(x=30, y=20)
rtbtn=tk.Button(self, text="Start", height=3, width=15, fg="white", bg="#004d99", command=lambda:[controller.show_frame(q1)])
rtbtn.place(x=350, y=200)
class q1(tk.Frame):
def __init__(self, parent, controller):
tk.Frame.__init__(self, parent)
self.configure(bg="white")
lbl=Label(self, text="Question 1", font=("Microsoft Jhenghei UI Light", 35), bg="white", fg="#004d99")
lbl.place(x=30, y=20)
txt=Text(self, height=5, width=70)
txt.config(state="normal")
txt.insert(tk.INSERT,qlist[0][0])
txt.config(state="disabled")
txt.place(x=35,y=125)
ans=Entry(self)
ans.place(x=650, y=350,height=25)
nxt=Button(self, text="Next", height=3, width=15, fg="white", bg="#004d99", command=lambda:[checkAns(ans.get(), 0),controller.show_frame(q2)])
nxt.place(x=650, y=400)
class q2(tk.Frame):
def __init__(self, parent, controller):
tk.Frame.__init__(self, parent)
self.configure(bg="white")
lbl=Label(self, text="Question 2", font=("Microsoft Jhenghei UI Light", 35), bg="white", fg="#004d99")
lbl.place(x=30, y=20)
txt=Text(self, height=5, width=70)
txt.config(state="normal")
txt.insert(tk.INSERT,qlist[1][0])
txt.config(state="disabled")
txt.place(x=35,y=125)
ans=Entry(self)
ans.place(x=650, y=350,height=25)
nxt=Button(self, text="Next", height=3, width=15, fg="white", bg="#004d99", command=lambda:[checkAns(ans.get(), 1),controller.show_frame(q3)])
nxt.place(x=650, y=400)
class q3(tk.Frame):
def __init__(self, parent, controller):
tk.Frame.__init__(self, parent)
self.configure(bg="white")
lbl=Label(self, text="Question 3", font=("Microsoft Jhenghei UI Light", 35), bg="white", fg="#004d99")
lbl.place(x=30, y=20)
txt=Text(self, height=5, width=70)
txt.config(state="normal")
txt.insert(tk.INSERT,qlist[2][0])
txt.config(state="disabled")
txt.place(x=35,y=125)
ans=Entry(self)
ans.place(x=650, y=350,height=25)
nxt=Button(self, text="Next", height=3, width=15, fg="white", bg="#004d99", command=lambda:[checkAns(ans.get(), 2),controller.show_frame(q4)])
nxt.place(x=650, y=400)
class q4(tk.Frame):
def __init__(self, parent, controller):
tk.Frame.__init__(self, parent)
self.configure(bg="white")
lbl=Label(self, text="Question 4", font=("Microsoft Jhenghei UI Light", 35), bg="white", fg="#004d99")
lbl.place(x=30, y=20)
txt=Text(self, height=5, width=70)
txt.config(state="normal")
txt.insert(tk.INSERT,qlist[3][0])
txt.config(state="disabled")
txt.place(x=35,y=125)
ans=Entry(self)
ans.place(x=650, y=350,height=25)
nxt=Button(self, text="Next", height=3, width=15, fg="white", bg="#004d99", command=lambda:[checkAns(ans.get(), 3),controller.show_frame(q5)])
nxt.place(x=650, y=400)
class q5(tk.Frame):
def __init__(self, parent, controller):
tk.Frame.__init__(self, parent)
self.configure(bg="white")
lbl=Label(self, text="Question 5", font=("Microsoft Jhenghei UI Light", 35), bg="white", fg="#004d99")
lbl.place(x=30, y=20)
txt=Text(self, height=5, width=70)
txt.config(state="normal")
txt.insert(tk.INSERT,qlist[4][0])
txt.config(state="disabled")
txt.place(x=35,y=125)
ans=Entry(self)
ans.place(x=650, y=350,height=25)
nxt=Button(self, text="End Test", height=3, width=15, fg="white", bg="#004d99", command=lambda:[checkAns(ans.get(), 4),resultReview(),controller.show_frame(resultPage)])
nxt.place(x=650, y=400)
class resultPage(tk.Frame):
def __init__(self, parent, controller):
tk.Frame.__init__(self, parent)
self.configure(bg="white")
lbl=Label(self, text="Results", font=("Microsoft Jhenghei UI Light", 35), bg="white", fg="#004d99")
lbl.place(x=30, y=20)
nxt=Button(self, text="Restart", height=3, width=15, fg="white", bg="#004d99", command=lambda:[refresh(),controller.show_frame(StartPage)])
nxt.place(x=650, y=400)
qlist=0
def getQuestions():
global qlist
qlist=[0,0,0,0,0]
noschosen=[]
with open("questiontest.txt","r") as f:
lines=f.read().strip().split("\n")
i=0
while i<len(qlist):
chosen=False
n=random.randint(1,20)
while n in noschosen:
n=random.randint(1,20)
qline=2*n-1
noschosen.append(n)
qlist[i]=(lines[qline],lines[qline+1])
i=i+1
getQuestions()
results=[]
def checkAns(ans, questionAns):
global results
if ans == qlist[questionAns][1]:
results.append("right")
else:
results.append("wrong")
correct=0
def resultReview():
global correct
for index in range (0,len(results)):
if results[index]=="right":
correct=correct+1
print (results)
print ("You got", correct,"out of 5 right")
def refresh():
global qlist,results, correct
qlist=0
results=[]
correct=0
getQuestions()
print (qlist)
app = MathsApp()
app.mainloop()
txt文件包含：
.
Question1
Answer1
Question2
Answer2
Question3
Answer3
Question4
Answer4
Question5
Answer5
Question6
Answer6
Question7
Answer7
Question8
Answer8
Question9
Answer9
Question10
Answer10
Question11
Answer11
Question12
Answer12
Question13
Answer13
Question14
Answer14
Question15
Answer15
Question16
Answer16
Question17
Answer17
Question18
Answer18
Question19
Answer19
Question20
Answer20
问题的答案为“ AnswerX”，X是文本框中的问题编号。有没有办法更改显示在文本框中的文本？还是除了关闭并立即重新打开程序外别无选择？如果是这样，我该怎么办？