python GUI(Tkinter) practices

import Tkinter

class Test:
  def __init__(self,master):
    frame=Tkinter.Frame(master)
    frame.pack()
    self.button=Tkinter.Button(frame,text='Quit',fg='red',command=frame.quit)
    self.button.pack(side='left')
    self.hi_there=Tkinter.Button(frame,text='hello',command=self.say_hi)
    self.hi_there.pack(side='left')

  def say_hi(self):
    print 'hi there, this is a test!'

win=Tkinter.Tk()
Test=Test(win)
win.mainloop()

from Tkinter import *

root=Tk()
def hello():
  print 'hello'

menubar=Menu(root)
menubar.add_command(label='hello',command=hello)
menubar.add_command(label='quit',command=root.quit)

root.config(menu=menubar)

mainloop()

from Tkinter import *

root=Tk()

def hello():
  print 'hello'

def about():
  w=Label(root,text='hello,test')
  w.pack(side='top')

menubar=Menu(root)

filemenu=Menu(menubar,tearoff=0)
filemenu.add_command(label='Open',command=hello)
filemenu.add_command(label='Save',command=hello)
filemenu.add_separator()
filemenu.add_command(label='Exit',command=root.quit)
menubar.add_cascade(label='File',menu=filemenu)

filemenu2=Menu(menubar,tearoff=0)
filemenu2.add_command(label='Open',command=hello)
filemenu2.add_command(label='Save',command=hello)
menubar.add_cascade(label='Edit',menu=filemenu2)

filemenu3=Menu(menubar,tearoff=0)
filemenu3.add_command(label='About',command=about)
menubar.add_cascade(label='Help',menu=filemenu3)

root.config(menu=menubar)
mainloop()

reference:
http://www.yiibai.com/python/python_gui_programming.html