import os
import tkinter as tk
from tkinter import *

master = tk.Tk()
entry1_str = tk.StringVar()

def helloCallBack():
    entry1_str.set("好的回购好的回购好的回购好的回购好的回购好的回购")
    print("hello word")
    
def gui():
    master.title("Lable家族")
    master.geometry("800x480")
    master.update()

    theLableFrame = tk.LabelFrame(master,text="文件列表",padx=5, pady=5,bd=5)
    theLableFrame.pack(fill=BOTH, expand=YES, padx=10, pady=10)
    
    theLable = tk.Label(theLableFrame,width = master.winfo_width(),wraplength = 80,anchor=NW,textvariable=entry1_str)
    theLable.pack(fill=BOTH, expand=YES, padx=10, pady=10)
    
    theButton = tk.Button(master, text ="点我", command = helloCallBack)
    theButton.pack(side='bottom')
    
    master.mainloop()


if __name__ == '__main__':
    gui()
    

实现效果图如下：