Python 7 Levels, L7, Unit 79, Guess Number Game in tkinter

message box

import tkinter as tk
from tkinter import messagebox

root = tk.Tk()#Create main window
root.title("Messagebox")
root.geometry("400x300+200+100")

def hello():
    tk.messagebox.showinfo("showinfo","Hello World!")
    tk.messagebox.askokcancel("askokcancel", "OK or Cancel?")
    tk.messagebox.askquestion("askquestion", "Ask Question?")
    tk.messagebox.askretrycancel("askretrycancel", "Ask Retry or Cancel?")
    tk.messagebox.showerror("showerror", "Show Error")
    tk.messagebox.showwarning("showwarning", "Show Warning")

#add button
btn_01 = tk.Button(root,text = "Button",command = hello)
btn_01.pack()

root.mainloop()

Guess Number Game

import tkinter as tk
from tkinter import simpledialog
import random


class Application:

    def __init__(self):
        self.root = tk.Tk()
        self.root.title("Guessing Number Game")
        self.root.geometry("260x80+400+300")
        self.comp_rand = 0
        self.times = 0
        self.createWidget()

    def createWidget(self):
        self.frame = tk.Frame(self.root)
        self.frame.pack()
        self.label = tk.Label(self.frame,text="Please input a number")
        self.label.grid(row=0,column = 0,pady=10)
        self.v = tk.StringVar()
        self.entry = tk.Entry(self.frame,state="disable",textvariable=self.v)
        self.entry.grid(row=0,column=1,pady=10)
        self.btn = tk.Button(self.frame,text="start game",command=self.clickbtn)
        self.btn.grid(row=1,column=0,columnspan=2,stick="ew")

    def clickbtn(self):
        if self.btn["text"] == "start game":
            self.entry["state"] = "normal"
            self.btn["text"] = "Confirm"
            while True:
                value_min = tk.simpledialog.askinteger("Set Minimum Number","Minimum Number")
                if value_min != None:
                    break
            while True:
                value_max = tk.simpledialog.askinteger("Set Maximum Number","Maximum Number")
                if value_max != None:
                    break
            while True:
                self.times = tk.simpledialog.askinteger("Set Guess Times","Times to Guess Number")
                if self.times != None:
                    break
            self.comp_rand = random.randint(value_min,value_max)
        elif self.btn["text"] == "Confirm":
            if self.times > 0:
                try:
                    input_value = int(self.entry.get())
                except ValueError:
                    tk.messagebox.showerror("System Information","You input non-digit number")
                else:
                    self.times -= 1
                    if input_value == self.comp_rand:
                        tk.messagebox.showinfo("System Information","Congratulations，Bingo, You win.")
                        self.entry["state"] = "disable"
                        self.btn["text"] = "start game"
                    else:
                        if input_value > self.comp_rand:
                            tk.messagebox.showerror("System Information","You guessed number is greater")
                        else:
                            tk.messagebox.showerror("System Information","You guessed number is less")
                        if self.times == 0:
                            tk.messagebox.showinfo("System Information",\
                                                   "Sorry，you guessed too much times. You lose.")
                            self.entry["state"] = "disable"
                            self.btn["text"] = "start game"
                        else:
                            tk.messagebox.showinfo("System Information",\
                                                    "You have "+str(self.times)+" chances.")
                        
                      
    def run(self):
        self.root.mainloop()

app = Application()
app.run()