新しいウィンドウに画像/ボタンが表示されない（tkinter）

Question

メインプログラムから2番目のウィンドウ（関数 'learn'で定義）を開こうとしています - ウィンドウは問題なく開きますが、ボタン/画像は表示されません表示されます。誰かが私が間違っていることを知っていますか？すべての画像は.gifファイルで、プログラムと同じフォルダに置かれます。

「learn」のコードを別のpythonファイルに書きました。最初は別のプログラムとしてそのファイルを開こうとしましたが、動作しませんでした。

from tkinter import * 
import linecache 
import os 

root = Tk() 
root.geometry('1200x800') #Dimensions of the window 
root.title("stud(y)ious") #title of the window 
container1 = Frame(root) 
container1.pack(side = TOP, anchor = W) 

container2= Frame(root) #Bottom container 
container2.pack(side = BOTTOM,pady = 50) #space between the bottom of the timetable and the two buttons; initially this was cropping the timetable too much so this value was DECREASED in order to shorten the amount of padding that exists around the two buttons at the bottom 

#All the images used on the home page; keeping them all in one place so they can be eaisly replaced by anotehr programmer if need be 
imgNote = PhotoImage(file='img_note.gif') #'N O T E' 
imgHeader = PhotoImage(file='img_title.gif') #'stud(y)ious' 'T I M E T A B L E' 
imgTimetable = PhotoImage(file='btn_timetable.gif') #replacable timetable image 
imgCreateBtn = PhotoImage(file='btn_create.gif') #'create' 
imgLearnBtn = PhotoImage(file='btn_learn.gif') #'learn' 

toolbar = Canvas() 
Header = Label(toolbar, image = imgHeader).pack() #creation of header, space for imgHeader; above and seperated from main buttons 
toolbar.pack() 

def destroy(): #closing the window 
    root.destroy() 

def create(): #The window that appears when the 'create' button is clicked 
    toplevel = Toplevel() 
    labelCreateHeader = Label(toplevel, image=imgNote) #header graphic 
    labelCreateHeader.pack() 
    labelCreateText = Label(toplevel, text=txtCreate) #text (from variable noted below) 
    labelCreateText.pack() 

def learn(): #The window that appears when the 'learn' button is clicked 
    window1 = Tk() 
    window1.geometry('1200x800') 
    window1.title("stud(y)ious: Learn") #title of the window, colon to show connection to studyious_main.py 

     #Opens the questions file (in read mode) and makes a list of them, one per line 
    with open('studyious_questions.txt', 'r+') as questionfile: 
     questions = questionfile.readlines() 
     #Takes off the '\n' from the end of each line so they are neatly presented and easy to read 
    questions = [i.strip('\n') for i in questions] 

     #reading answers; holds a string only - default value ""; type checking 
    ans1 = StringVar() 
    ans2 = StringVar() 
    ans3 = StringVar() 
    ans4 = StringVar() 
    ans5 = StringVar() 

    answers = [] 
    for i in range(1,9): 
     answers.append(linecache.getline('studyious_answers.txt', i)) 
    answers = [i.strip('\n') for i in answers] 

    def destroy2(): 
     window1.destroy() #closes window, function attached to '⬅' button 

    def answering(answer, index): #The window that appears when the 'create' button is clicked 
     toplevel = Toplevel() 
     labelCorrectHeader = Label(toplevel, text=txtInfoCorrect, image=imgCorrect) #header graphic 
     labelCorrect = Label(toplevel, text=txtInfoCorrect) #text (from variable noted below) 
     labelIncorrectHeader = Label(toplevel, text=txtInfoIncorrect, image=imgIncorrect) 
     labelIncorrect = Label(toplevel, text=txtInfoIncorrect) 
     if answer == answers[index]: #selection structure to decide whether the 'correct' (if) or 'incorrect' (else) window pops up 
      labelCorrectHeader.pack() 
      labelCorrect.pack() 
     else: 
      labelIncorrectHeader.pack() 
      labelIncorrect.pack() 

     #The following two text variable were written using triple quotations so the program would register line breaks effectively 
    txtInfoCorrect = """ 
     Keep up the good work! 
     Remember, for every 10 questions, take a lil' break <3 

     """ 
    txtInfoIncorrect = """ 
     Better luck next time! 
     Keep going, you can do it! 

     """ 

    container01 = Frame(window1) 
    container01.pack(anchor = W) 

    ButtonQuit = Button(container01, command=destroy2) #FIXME should open the other python file, containing the homepage 
    ButtonQuit["text"] = "⬅" 
    ButtonQuit.pack(side = LEFT, padx = 10, pady = 8) 

     #Directory of images used in this program 
    imgCorrect = PhotoImage(file='img_correct.gif') 
    imgIncorrect = PhotoImage(file='img_incorrect.gif') 
    imgAnswer = PhotoImage(file='btn_answer.gif') 
    imgHeaderb = PhotoImage(file='img_header.gif') 

    toolbar1 = Canvas() 
    Header1 = Label(toolbar1, image = imgHeaderb).pack() #Placing the header image (img_header) at the top of the page 
    toolbar1.pack() 

     #THE QUESTIONS 
    question1 = Label(window1, text=questions[0]).pack(pady = 10) #states the question according to it's number in the list (e.g this one is 0 because it is the first item in the studyious_questions.txt file 
     #pady refers to the space between each of teh questions (so things dont look too cluttered and unprofessional) 
    entry1= Entry(window1, textvariable = ans1) #User can cnter answer to to entry box 
    entry1.pack() 
    ButtonAnswer1 = Button(image = imgAnswer,command=lambda:answering(ans1.get(), 0)).pack() #answer button, when clicked entered answer will be checked against teh answer recorded in studyious_answers.txt to see if it is correct 
     #For example, for the example above, the answer entered by the user is checked against the first answer in the list of answers (index of 0) to see if it correct; promopting a response from the variable 'answering' (which will either produce the 'correct' or 'incorrect dialogue window) 

    question2 = Label(window1, text=questions[1]).pack(pady = 10) 
    entry2= Entry(window1, textvariable = ans2) 
    entry2.pack() 
    ButtonAnswer2 = Button(image = imgAnswer,command=lambda:answering(ans2.get(), 1)).pack() 

    question3 = Label(window1, text=questions[2]).pack(pady = 10) 
    entry3= Entry(window1, textvariable = ans3) 
    entry3.pack() 
    ButtonAnswer3 = Button(image = imgAnswer,command=lambda:answering(ans3.get(), 2)).pack() 

    question4 = Label(window1, text=questions[3]).pack(pady = 10) 
    entry4= Entry(window1, textvariable = ans4) 
    entry4.pack() 
    ButtonAnswer4 = Button(image = imgAnswer,command=lambda:answering(ans4.get(), 3)).pack() 

    question5 = Label(window1, text=questions[4]).pack(pady = 10) 
    entry5= Entry(window1, textvariable = ans5) 
    entry5.pack() 
    ButtonAnswer5 = Button(image = imgAnswer,command=lambda:answering(ans5.get(), 4)).pack() 

    window1.mainloop() 

txtInfo = """ 
text 
""" 

txtCreate = """ 
text 
""" 

def timetable(): 
    toplevel = Toplevel() #Ensure window pops up above the main window as a pop up window 
    labelTimetableHeader = Label(toplevel, image=imgNote) #header graphic to match aesthetic of the rest of the program 
    labelTimetableHeader.pack() 
    labelTimetableText = Label(toplevel, text=txtInfo) #The main body of text (as seen above in txtInfo) 
    labelTimetableText.pack() 

btnQuit = Button(container1,command=destroy) #Quit button, closes window 
btnQuit["text"] = "Quit" 
btnQuit.pack(side = LEFT, padx = 10, pady = 8) #the difference between the top and left padding is that there is automatically two points of padding from the top of the window 

TimetableButton = Button(image = imgTimetable,command=timetable).pack() #a replacable image that allows users to enter place their own timetable on the home page 
#Initially the button sat squished in the corner whih made the finishing of the home page look very rough, cluttered and unprofessional 

#Button 1; opens a small window giving the user details of how to enter the questions and answers they wish to test themselves on 
btnCreate = Button(container2, image = imgCreateBtn,command=create).pack(side = LEFT, padx =100) #padding around teh sides seperates the two buttons - 'create' and 'learn' 

#Button 2; redirect to the quiz program, opening another window with the quiz program 
btnLearn = Button(container2, image = imgLearnBtn,command=learn).pack(side = BOTTOM, padx = 100) 

root.mainloop() 

Answer 1

あなたはこのようなあなたのボタンのいずれかのマスターとしてwindow1を置くのを忘れ：

ButtonAnswer1 = Button(image = imgAnswer,command=lambda:answering(ans1.get(), 0)).pack() 

は、すべてのButtonAnswer1-5にWINDOW1を追加します。

ButtonAnswer1 = Button(window1, image = imgAnswer,command=lambda:answering(ans1.get(), 0)).pack()