寫入與讀取檔案

import tkinter as tk
from tkinter import messagebox as msgbox
from tkinter import scrolledtext as st
import os
import shutil as sh

win=tk.Tk()
win.title("我的視窗")
win.geometry('800x600')




def clearTextInput():   #"1.0"和"end"是指 Tkinter 文字框控制元件中內容的第一個字元和最後一個字元
    ST.delete("1.0","end")

def MyFact(num):
    total=1
    for i in range(1,num+1):
        total*=i
    return total

def Btn1Click():
    a=int(TB1_value.get())
    b=MyFact(a)
    L1['text']=str(b)
    TB1_value.set("")



def Btn3Click():
    result = ""
    path="C:\\zzz"
    nn="mytext.txt"
    f=open(path+'\\'+nn,'w')
    for i in range(1, 10):
        for j in range(1, 10):
            f.write('{}'.format(i * j)+"\t")
        f.write("\n")
    f.close()

    msgbox.showinfo("訊息", "檔案寫入成功")

def Btn4Click():
        path = "C:\\zzz"
        nn = "mytext.txt"
        result = ""
        with open(path + "\\" + nn, "r", encoding="932") as f:
            aa = f.readlines()
            for a in aa:
                result+=a
        f.close()
        ST.insert(tk.INSERT, result)
        msgbox.showinfo("訊息", "檔案讀取成功")


L1=tk.Label(win,text="Python的標籤文字",width=30,height=2,bg='pink')
Btn1=tk.Button(win,text="清除",width=10,height=2,command=clearTextInput)
TB1_value=tk.StringVar()
TB1=tk.Entry(win,text="",width=30,textvariable=TB1_value)

ST=st.ScrolledText(win,width=60,height=20)
Btn3=tk.Button(win,text="寫入",width=10,height=2,command=Btn3Click)
Btn4=tk.Button(win,text="讀取",bg="gray",width=10,height=2,command=Btn4Click)
TB1.place(x=50,y=30)
L1.place(x=50,y=50)
Btn1.place(x=50,y=100)
ST.place(x=300,y=30)
Btn3.place(x=300,y=400)
Btn4.place(x=400,y=400)

win.mainloop()