import tkinter as tk
#import sys
import os
root = tk.Tk()
def open_calc():
os.system("calc")
def open_chrome():
os.system("start chrome")
def open_code():
os.system("Code")
root.title("Thonny window")
lbl1 = tk.Label(root,text='Python IDE Thonny.org')
lbl1.pack(side="top")
btn=tk.Button(root,text='Start 计算器',command=open_calc)
btn.pack(side='left')
btn=tk.Button(root,text='Start Chrome Browser浏览器',command=open_chrome)
btn.pack(side='top')
btn=tk.Button(root,text='Start vs Code',command=open_code)
btn.pack(side='bottom')
root.mainloop()