如何使第1帧先出现在第2帧Python GUI之前？

Question

您好，我正在尝试将我的欢迎框连接到我的问题框，目前我的问题框是通过文本文件创建的，我不明白为什么问题框在欢迎框之前出现，我已经尝试了我的解决方案，以使欢迎框首先出现，并且必须按下问题按钮以转到文本文件框中的问题，在该文本文件框中存储了我的所有测验选择题？，下面列出了代码，如果有人能帮我解决此问题，这对学校评估很重要，谢谢。我想做的是让欢迎框架首先与其类一起运行，然后将其链接到问题框架类，这样用户在进入下一个问题框架之前，必须在欢迎屏幕中输入他们的姓名和年龄。我还将在下面附加多项选择题的文本文件

从tkinter进口* 从tkinter导入ttk

随机输入

班级资本测验：

def __init__(self,parent):
    
    self.parent = parent
    self.index = 0 # for keeping track of which question we are up to
    self.correct = 0 # for keeping track of hjow many the user has got correct
    #formatting constants
    PX = 10
    PY = 10
    PY_RADIO = 3

    # Creates a list of Question objects
    self.questions = []
    q_file = open("questions.txt")
    q_list = q_file.readlines()
    for line in q_list:
        line = line[:-1] # removing newline character from the end
        tokens = line.split(",")
        self.questions.append(Question(tokens[0], tokens[1], tokens[2:]))         
    
    
    self.welcome = Frame(parent)
    self.welcome.grid(row=0, column=0)
    
    self.title_label = Label(self.welcome, text = "Welcome to Capital Quiz",
                            bg = "black", fg = "white", font = ("Time", '14', "bold italic"))
    self.title_label.pack(side=TOP,fill=X)
    
    self.text_label = Label(self.welcome, text = "This quiz is intended for students aged 7-12", fg= "black", font = ("Time", '11', "italic"))
    self.text_label.pack(side=BOTTOM,fill=X)
    
    self.name_label = Label(self.welcome, text = "Name", anchor = W, 
                           fg = "black", width = 10, padx = 30, pady = 10, font = ("Time", '12', "bold italic"))
    self.name_label.place(x=10,y=50)
    
    self.age_label = Label(self.welcome, text = "Age", anchor = W, 
                          fg = "black", width = 10, padx = 30, pady = 10, font = ("Time", '12', "bold italic"))
    self.age_label.place(x=10,y=80)
    
    #Drop down for Age
    tkvar = IntVar(root)
    
    age_range = [7, 8, 9, 10, 11, 12]
    tkvar.set(7)
    
    self.age_drop_down = OptionMenu(self.welcome, tkvar, *age_range)
    self.age_drop_down.place(x=120,y=90)
    self.age_drop_down.config(width=20)
                        
    
    self.name_entry = ttk.Entry(self.welcome, width = 20)
    self.name_entry.place(x=120,y=55)
    
    self.name_button = ttk.Button(self.welcome, text = 'NameCheck', command = self.name_check)
    self.name_button.place(x=180,y=150)
                     
    self.next_button = ttk.Button(self.welcome, text = 'Questions', command = self.next_frame)
    self.next_button.place(x=80,y=150)
    
    self.warning_label = Label(self.welcome, text = "", anchor=W,
                              fg = "red", width = 20, padx = 30, pady = 10)
    self.warning_label.place(x=150,y=200)        
    
    self.question = Frame(parent)
    self.question.grid(row=0, column=0)
    
    self.question_section_label = Label(self.question, text = "Question:", anchor = NW, width = 10, pady = PY, padx = PX)
    self.question_section_label.grid(row = 0, column = 0, sticky = NW)
    
    self.question_label = Label(self.question, text = "",  anchor = NW, pady = PY, padx = PX, wraplength = 220, height = 2, width = 40)
    self.question_label.grid(row = 0, column = 1, sticky = NW)

    self.question_label.configure(text = self.questions[self.index].question) 
    
    self.var = StringVar()
    self.var.set(0)

    # Radiobuttons are now stored in a list so that they may be easily
    # reconfigured for the next question. The number of choices provided
    # for each question is assumed to be the same
    self.rbs = []
    self.num_choices = len(self.questions[self.index].answers)
    for i in range(self.num_choices):
        ans_txt = self.questions[self.index].answers[i]
        self.rbs.append(Radiobutton(self.parent, text = ans_txt, variable = self.var, value = ans_txt, command = self.process_question, pady = 3))
        self.rbs[i].grid(row = i+1, column = 1,  sticky = NW)
        
    self.feedback = Label(parent, text = "", height = 3, font = ("Times", "12", "bold"), wraplength = 200)
    self.feedback.grid(row = self.num_choices + 1,  columnspan = 2)
    
    self.finish_btn = Button(self.question, text = "Finish", width = 4, command = self.finish_quiz)
    self.finish_btn.grid(row = self.num_choices + 2, column = 0, sticky = W, padx = PX, pady = PY)
    
    self.next_btn = Button(self.question, text = "Next", width = 4, command = self.next_question)
    self.next_btn.grid(row = self.num_choices + 2, column = 1, sticky = E, padx = PX, pady = PY)        
    
    
def next_frame(self):
    self.weclome.grid_remove()
    self.question.grid()
        
def process_question(self):
    """
        Disables the RadioButtons. Checks if the selected answer is the correct one and provides appropriate feedback
    """
    for rb in self.rbs:
        rb.configure(state = DISABLED)
    if self.var.get()==self.questions[self.index].answer:           
        self.correct += 1
        self.feedback.config(text = "Correct!  " + str(self.correct) + "/" + str(self.index + 1))
    else:
        self.feedback.config(text = "Incorrect! The answer is "+ self.questions[self.index].answer + "  " +
                             str(self.correct) + "/" + str(self.index + 1))

        
def next_question(self):
    """
        If the end of the question list has not been reached, the index is incremented and
        the question Label and Radiobuttons are reconfigured with the appropriate text from
        the next Question object. 
    """
    # There is still another question to ask                    
    if self.index < len(self.questions) - 1:
        for rb in self.rbs:
            rb.configure(state = NORMAL)
        self.index+=1
        self.question_label.configure(text = self.questions[self.index].question)

        self.var = StringVar()
        self.var.set(0)
        for i in range(len(self.questions[self.index].answers)):
            ans_txt = self.questions[self.index].answers[i]
            self.rbs[i].configure(text = ans_txt, variable = self.var, value = ans_txt )
        self.feedback.config(text = "", height = 3)
    else:
        self.finish_quiz()

def finish_quiz(self):
    """ The question Labels and Radionbuttons are removed and the feedback label
        is reconfigured to display a message informing the user that the quiz is
        over and the number they got correct. The height of the feedback Label is
        also reconfigured to stop the window resizing too dramatically."""
    self.question_section_label.configure(text = "")
    self.question_label.configure(text = "")
    for rb in self.rbs:
        rb.grid_remove()
    self.feedback.config(text = "Quiz over. You got " + str(self.correct) + " out of " + str(self.index + 1),
                          height = 10)
    self.next_btn.grid_remove()
    self.finish_btn.configure( width = 15, command = self.resume_quiz)
    if self.index + 1 == len(self.questions):
        self.finish_btn.configure(text = "Retake Quiz")
    else:
        self.finish_btn.configure(text = "Resume Quiz")

        
def resume_quiz(self):
    """ Presents either the next question from where they were up to (resume) or question 1(retake)"""
    if self.index + 1 == len(self.questions):
        self.correct = 0
        self.index = -1
    for rb in self.rbs:
        rb.grid()
    # replacing a few bits not covered in self.next_question
    self.question_section_label.configure(text = "")
    self.finish_btn.configure(text = "Finish", width = 10, command = self.finish_quiz)
    self.next_btn.grid()
    # Presents either the next question from where they were up to or question 1
    self.next_question()
    
def show_welcome(self):
    if self.once_done==True:
        for i in self.questions.winfo_children():
            i.destroy()
        self.questions.pack_forget()
    else:
        self.questions.pack_forget()
    self.welcome.pack(fill=BOTH,expand=1)
    
def name_check(self):
    try:
        if self.name_entry.get() == "":
            self.warning_label.configure(text = "Please enter name")
            self.name_entry.focus()
        elif self.name_entry.get().isalpha() == False:
            self.warning_label.configure(text = "Please enter text")
            self.name_entry.delete(0, END)
            self.name_entry.focus()    
        else:
            self.name_button.config(state=DISABLED)
    except ValueError:
        self.warning_label.configure(text = "Please enter a proper name")
        self.name_entry.delete(0, END)
        self.name_entry.focus()
            

课堂问题：

def __init__(self, question, answer, dummies):
    """
        Accepts a question, the correct answer and a list of incorrect
        answers as parameters.
    """
    self.question = question
    self.answer = answer
    self.dummies = dummies
    self.set_answers()

def set_answers(self):
    """
        Inserts the correct answer into a random position of the
        list of possible answers.
    """
    self.answers = self.dummies
    self.answers.insert(random.randrange(len(self.dummies)+1), self.answer)
             

顺便说一句，由于我无法在此处处理，您能否在最后添加此代码：

以下是文本文件中的内容：