我有一段代码，我已经返回并修复到目前为止。

这是一个数学游戏，可以生成一个问题；提出问题；检查它并加分。

我还是一个初学者，有一个问题，我看到很多人有问题。

虽然我还是想不通

我有一个条目小部件，想从中获取信息，但仍然会出错

有人能告诉我出了什么问题，把v=StringVar()放在哪里，为什么会出错(我想知道为什么)

这是一个WIP游戏，所以请忽略其他错误。

将tkinter作为tk导入

随机导入为rscore = 0

a = 0

b = 0

answer = 0

def question_gen():

global a

global b

global answer

a = r.randint(0,100)

b = r.randint(0,100)

answer = (a+b)

def question_checker():

global score

user_input = v.get

if user_input == answer:

score += 1

else:

score += 0

class Demo1:

def __init__(self, master):

self.master = master

self.frame = tk.Frame(self.master).pack()

self.label = tk.Label(self.frame, text = 'Welcome To My Wonderful Math Game\n\nHow To Play\n\nWhen you pick a difficulty a new window will pop up\nYou have to answer to the question\nBefore the timer runs out\n\nGood Luck!').pack()

self.button1 = tk.Button(self.frame, text = 'Easy', width = 25, command = self.new_window).pack()

self.button2 = tk.Button(self.frame, text = 'Hard', width = 25, command = self.new_window).pack()

def new_window(self):

self.newWindow = tk.Toplevel(self.master)

self.app = Demo2(self.newWindow)

class Demo2:

def __init__(self, master):

self.master = master

self.frame = tk.Frame(self.master).pack()

self.label = tk.Label(self.master, text = '{0} + {1} ='.format(a,b)).pack()

self.entry = tk.Entry(self.master, textvariable=v).pack()

self.quitButton = tk.Button(self.master, text = 'Quit', width = 25, command = self.close_windows).pack()

def close_windows(self):

self.master.destroy()

def main():

root = tk.Tk()

app = Demo1(root)

root.mainloop()

if __name__ == '__main__':

main()