# 导入所需的库
from tkinter import *
from tkinter import ttk

# 创建tkinter框架或窗口的实例
win=Tk()

# 设置窗口大小
win.geometry("700x350")

def change_bgcolor(e):
   win.config(background="green3")

def change_fgcolor(e):
   win.config(background="white")

# 添加按钮以触发事件
b1=Button(win, text="鼠标在我上面悬停", font=('Georgia 16'))
b1.pack(pady=60,anchor=CENTER)

# 绑定事件
for b in [b1]:
   b.bind("<Enter>",change_bgcolor)
   b.bind("<Leave>", change_fgcolor)

win.mainloop()