Python GUI （Tkinter）

from Tkinter import *
phonelist = [
['Meyers, Chris',  '343-4349'],
['Smith, Robert',  '689-1234'],
['Jones, Janet',   '483-5432'],
['Barnhart, Ralph','683-2341'],
['Nelson, Eric',   '485-2689'],
['Prefect, Ford',  '987-6543'],
['Zigler, Mary',   '567-8901'],
['Smith, Bob',     '689-1234']
]

def whichSelected () :
print "At %s of %d" % (select.curselection(), len(phonelist))
return int(select.curselection()[0])

def addEntry () :
phonelist.append ([nameVar.get(), phoneVar.get()])
setSelect ()

def updateEntry() :
phonelist[whichSelected()] = [nameVar.get(), phoneVar.get()]
setSelect ()

def deleteEntry() :
del phonelist[whichSelected()]
setSelect ()

def loadEntry  () :
name, phone = phonelist[whichSelected()]
nameVar.set(name)
phoneVar.set(phone)

def makeWindow () :
global nameVar, phoneVar, select
win = Tk()

frame1 = Frame(win)
frame1.pack()

Label(frame1, text="Name").grid(row=0, column=0, sticky=W)
nameVar = StringVar()
name = Entry(frame1, textvariable=nameVar)
name.grid(row=0, column=1, sticky=W)

Label(frame1, text="Phone").grid(row=1, column=0, sticky=W)
phoneVar= StringVar()
phone= Entry(frame1, textvariable=phoneVar)
phone.grid(row=1, column=1, sticky=W)

frame2 = Frame(win)       # Row of buttons
frame2.pack()
b1 = Button(frame2,text=" Add  ",command=addEntry)
b2 = Button(frame2,text="Update",command=updateEntry)
b3 = Button(frame2,text="Delete",command=deleteEntry)
b4 = Button(frame2,text=" Load ",command=loadEntry)
b1.pack(side=LEFT); b2.pack(side=LEFT)
b3.pack(side=LEFT); b4.pack(side=LEFT)

frame3 = Frame(win)       # select of names
frame3.pack()
scroll = Scrollbar(frame3, orient=VERTICAL)
select = Listbox(frame3, yscrollcommand=scroll.set, height=6)
scroll.config (command=select.yview)
scroll.pack(side=RIGHT, fill=Y)
select.pack(side=LEFT,  fill=BOTH, expand=1)
return win

def setSelect () :
phonelist.sort()
select.delete(0,END)
for name,phone in phonelist :
select.insert (END, name)

win = makeWindow()
setSelect ()
win.mainloop()