from tkinter import *

win= Tk()
win.geometry("600x300")

label= Label(win, text= "写点什么??", font= ('Helvetica', 25))
label.pack(pady=20)

#创建文本窗口小部件
text= Text(win, height=10)
text.pack()

def delete():
   text.delete("1.0","end")

#创建“删除”按钮，以从文本窗口小部件中删除文本

b1= Button(win, text= "删除",command= delete)
b1.pack(pady=10)
win.mainloop()