制作我的第一个UI程序，有什么可以改进的吗？

Question

我做浏览器已经有一段时间了。我刚开始做一个小项目，帮助我学习一门课程。我能做些什么来提高代码可读性/不良做法吗。我不得不删除大部分标签和按钮（由于库存过剩的发布规则），但我保留了其中一个，以便您了解我是如何编程这些功能的

    import tkinter as tk
    import pandas as pd 
    import datetime as datetime
    import random

    #Global Variables
    labelH1 = ("Verdana", 20)
    labelH2 = ("Verdana", 17)
    labelParagraph = ("Verdana", 13)
    labelButton = ("Verdana", 11)

########################################################################
class GUI:
    """"""
    def __init__(self, root):
        """Constructor"""
        self.root = root # root is a passed Tk object
        #Custom Window Height
        #TODO! change to ratio
        window_height = 700
        window_width = 1000
        #Get User Screen Info
        screen_width = root.winfo_screenwidth()
        screen_height = root.winfo_screenheight()
        #Center GUI
        x_cordinate = int((screen_width/2) - (window_width/2))
        y_cordinate = int((screen_height/2) - (window_height/2))
        #Set the Window's Position and dimensions
        root.geometry("{}x{}+{}+{}".format(window_width, window_height, x_cordinate, y_cordinate))
    ########################################################################        
    #LANDING PAGE
    def mainMenu(self):
        self.frame = tk.Frame(self.root)
        self.frame.pack()
        self.lastPage = "Main Menu"

        #TEXT/LABELS
        header = tk.Label(self.frame, text="Welcome to a quiz", font=labelH1 )
        header.grid(row=0, column = 3, ipady =20)

        SBJMath = tk.Label(self.frame, text="Math", font=labelH2 )
        SBJMath.grid(row=1, column = 3)
        #BUTTONS
        #MATHS QUIZZES
        BTN_BasicMath = tk.Button(self.frame, text="Primer Statistics", font=labelButton, command = lambda: self.quizInstructions("BasicMath"))
        BTN_BasicMath.grid(row=2,column=2, pady=10)
        #EXTRA BUTTONS
        BTNQuit = tk.Button(self.frame, text="Quit", font=labelButton, command =root.destroy)
        BTNQuit.grid(row=13, column=0)
    ########################################################################      
    #ABOUT QUIZ PAGE    
    def quizInstructions(self, quizName):
        self.removethis()
        self.lastPage = "Quiz About"
        quizHeader = ""
        quizAbout = ""
        chooseQuiz = ""
        if quizName == "BasicMath":
            quizHeader = "Primer Statistics"
            quizAbout =  """big line"""
            chooseQuiz = ""
        self.frame = tk.Frame(self.root)
        self.frame.pack()
        tk.Label(self.frame, text=quizHeader, font=labelH1 ).grid(row=0, column=3, pady = 20)
        tk.Label(self.frame, text=quizAbout, font=labelParagraph, wraplength=600,anchor="n" ).grid(row=1, column=3, pady = 30)
        tk.Button(self.frame, text="Go Back", font=labelButton, command=self.returnToLastFrame).grid(row=2, column=3, sticky = tk.W)
        tk.Button(self.frame, text="Start Quiz", font=labelButton, command=self.quiz ).grid(row=2, column=3, sticky = tk.E)  
    ########################################################################
    #QUIZ GUI
    def quiz(self):
        self.lastPage = "Quiz"
        self.removethis()
        self.frame = tk.Frame(self.root)
        self.frame.pack()
        self.quizLogic()

    ########################################################################
    #QUIZ LOGIC        
    def quizLogic(self):
        pass
    def removethis(self):
        self.frame.destroy()
    #Go back
    def returnToLastFrame(self):
      self.removethis()
      if self.lastPage == "Main Menu":
          pass
      if self.lastPage == "Quiz About":
          self.mainMenu()
      if self.lastPage == "Quiz":
          self.quizInstructions()
      else:
          pass

    #----------------------------------------------------------------------
    if __name__ == "__main__":
        root = tk.Tk()
        window = GUI(root).mainMenu()
        root.mainloop()