Question

我确定答案很明显，但我无法发现它！我有一个非常基本的测验（使用Tkinter和Python 3），它使用2个数组，显示问题，然后在点击提交按钮时使用数组索引匹配输入的答案。

索引0处的问题显示两次 - 无法理解原因
分数没有正确增加 - 即使它是一个全局变量 - 它每次只显示1。
如何在到达列表结尾后让测验移至打印语句？

我已经尝试在提交函数中放置一个IF语句来检查i的值但是无法使其工作。有人可以指出我的错误吗？

from tkinter import *

global questions
questions =["What is the name of the Simpsons' next door neighbour?","What is the name of the    school bus driver?",
        "Who runs the Kwik-e-mart?","What does Bart do at the end of the opening credits?"]
global answers
answers = [ "Ned Flanders","Otto","Apu","Write On The Blackboard"]

global score
score = 0
global i
i = 0




def submit():
    '''runs the submit button'''
    global i
    global score

    question.config(text=questions[i])
    if answer.get().lower()==answers[i].lower():
        score+=1
    else:
        score=score
    i+=1

    scoretxt.config(text =str(score))
    answer.delete(0,END)


window = Tk()
window.title("Simpsons Quiz")
window.wm_iconbitmap("homer.ico")
window.configure(background ="#ffd600")

banner = PhotoImage(file ="the-simpsons-banner.gif")
Label(window,image = banner).grid(row = 0,columnspan = 6)
Label(window,text = "Question : ",bg ="#ffd600",justify=LEFT).grid(row = 1,column = 0)
Label(window,text = "Type answer here: ",bg = "#ffd600",justify=LEFT).grid(row = 3, column = 0)
scoreLabel =Label(window,bg = "#ffd600")
scoretxt = Label(window,text ="Your score is: ?",bg = "#ffd600")
scoreLabel.grid(row=5,column = 2)
scoretxt.grid(row = 6,column = 2)
question=Label(window,bg = "white",text= questions[0],justify=LEFT)
question.grid(row =1,column=1)
answer = Entry(window,bg ="white",width = 30)
answer.grid(row = 3,column=1)

# make a submit button

Button(window,text= "Submit",bg = "white",command = submit).grid(row = 3,column = 2)

mainloop()

Answer 1

1）在递增i之前，您正在打印问题。这就是你得到两次的原因 2）由于您使用global，这始终是1。在python中，您可以使用global关键字来更改变量的范围。可悲的是，我的英语不足以解释这一点。请查看these answers 3）您可以使用try-except阻止。我在那里使用它，因为这是你得到错误的确切行。您可以扩大其范围。

from tkinter import *

questions =["What is the name of the Simpsons' next door neighbour?","What is the name of the    school bus driver?",
        "Who runs the Kwik-e-mart?","What does Bart do at the end of the opening credits?"]

answers = [ "Ned Flanders","Otto","Apu","Write On The Blackboard"]

#removed globals from here
score = 0
i = 0

def submit():
    '''runs the submit button'''
    global i
    global score

    if answer.get().lower()==answers[i].lower():
        score+=1

    i+=1 #first increment, then show the question since you already show it at startup

    try:  #since you get the IndexError on this line, I used on here
        question.config(text=questions[i])
    except IndexError:
        print ("something")

    scoretxt.config(text = "Your score is: {}".format(str(score)))
    answer.delete(0,END)


window = Tk()
window.title("Simpsons Quiz")
window.wm_iconbitmap("homer.ico")
window.configure(background ="#ffd600")

banner = PhotoImage(file ="the-simpsons-banner.gif")
Label(window,image = banner).grid(row = 0,columnspan = 6)
Label(window,text = "Question : ",bg ="#ffd600",justify=LEFT).grid(row = 1,column = 0)
Label(window,text = "Type answer here: ",bg = "#ffd600",justify=LEFT).grid(row = 3, column = 0)
scoreLabel =Label(window,bg = "#ffd600")
scoretxt = Label(window,text ="Your score is: ?",bg = "#ffd600")
scoreLabel.grid(row=5,column = 2)
scoretxt.grid(row = 6,column = 2)
question=Label(window,bg = "white",text= questions[0],justify=LEFT)
question.grid(row =1,column=1)
answer = Entry(window,bg ="white",width = 30)
answer.grid(row = 3,column=1)

# make a submit button

Button(window,text= "Submit",bg = "white",command = submit).grid(row = 3,column = 2)

mainloop()

此外，您可能希望使用字典而不是问题 - 答案列表。

Python 3和Tkinter-如何控制测验循环

1 个答案: