For those of you who are interested, here is a Python program that will do the conversion for you ...

# run_2to3_convert.py
#
# convert a Python2 code file to a Python3 code file
# generates a backup file and overwrites the original
# file with the converted file
#
# it is best to put this file into a special directory
# together with the Python2 file you want to convert
#
# run this program with Python32

import subprocess

# the Python2x code file you want to convert ...
# should be in the working directory
python2x_scriptfile = "tkSnack.py"

# location of python3 and convert utility
python3 = "C:/Python32/Python.exe"
utility = "C:/Python32/Tools/Scripts/2to3.py",
cmd = "-w"
subprocess.call([python3, utility, cmd, python2x_scriptfile])

Sorry, something went wrong here once again. Here is the tone generator code ...

#! /usr/bin/env python

# create a tone generator with Tkinter that plays a sine wave from 50 to 4000 hertz
# needs Python module  tkSnack  developed at KTH in Stockholm, Sweden
# get the free download: snack2210-py.zip
# from: http://www.speech.kth.se/snack/
# download size and date: 745k (December 14, 2005)
# I modified tkSnack.py to run with Python32 via utility 2to3.py
# on my system I copied tkSnack.py to
# C:\Python32\Lib and the folder snacklib to C:\Python32\tcl
# tested with Python32   by  vegaseat   02apr2011

"""
Frequency Note Table:
  Frequency   Note   MIDI#
    27.5000    A0     21
    29.1352    A#0    22
    30.8677    B0     23
    32.7032    C1     24
    34.6478    C#1    25   # C#1 = C1 * 1.059463094
    36.7081    D1     26   # 1.059463094 = 12th root of 2
    38.8909    D#1    27
    41.2034    E1     28
    43.6535    F1     29
    46.2493    F#1    30
    48.9994    G1     31
    51.9131    G#1    32
    55.0000    A1     33
    58.2705    A#1    34
    61.7354    B1     35
    65.4064    C2     36
    69.2957    C#2    37
    73.4162    D2     38
    77.7817    D#2    39
    82.4069    E2     40
    87.3071    F2     41
    92.4986    F#2    42
    97.9989    G2     43
   103.8262    G#2    44
   110.0000    A2     45
   116.5409    A#2    46
   123.4708    B2     47
   130.8128    C3     48
   138.5913    C#3    49
   146.8324    D3     50
   155.5635    D#3    51
   164.8138    E3     52
   174.6141    F3     53
   184.9972    F#3    54
   195.9977    G3     55
   207.6523    G#3    56
   220.0000    A3     57
   233.0819    A#3    58
   246.9417    B3     59
   261.6256    C4     60
   277.1826    C#4    61
   293.6648    D4     62
   311.1270    D#4    63
   329.6276    E4     64
   349.2282    F4     65
   369.9944    F#4    66
   391.9954    G4     67
   415.3047    G#4    68
   440.0000    A4     69
   466.1638    A#4    70
   493.8833    B4     71
   523.2511    C5     72
   554.3653    C#5    73
   587.3295    D5     74
   622.2540    D#5    75
   659.2551    E5     76
   698.4565    F5     77
   739.9888    F#5    78
   783.9909    G5     79
   830.6094    G#5    80
   880.0000    A5     81
   932.3275    A#5    82
   987.7666    B5     83
  1046.5023    C6     84
  1108.7305    C#6    85
  1174.6591    D6     86
  1244.5079    D#6    87
  1318.5102    E6     88
  1396.9129    F6     89
  1479.9777    F#6    90
  1567.9817    G6     91
  1661.2188    G#6    92
  1760.0000    A6     93
  1864.6550    A#6    94
  1975.5332    B6     95
  2093.0045    C7     96
  2217.4610    C#7    97
  2349.3181    D7     98
  2489.0159    D#7    99
  2637.0205    E7    100
  2793.8259    F7    101
  2959.9554    F#7   102
  3135.9635    G7    103
  3322.4376    G#7   104
  3520.0000    A7    105
  3729.3101    A#7   106
  3951.0664    B7    107
  4186.0090    C8    108
"""

try:
    # Python2
    import Tkinter as tk
except ImportError:
    # Python3
    import tkinter as tk

from tkSnack import *

root = tk.Tk()

initializeSnack(root)
"""AudioControllerSingleton().playLatency(100)"""

s = Sound()

filt = Filter('generator', 440.0)
        
def play():
   s.stop()
   s.play(filter=filt)
        
def stop():
   s.stop()        

def config(arg):
   type = var.get()
   if var.get() == "sine" :
      shape = 0.0
   elif var.get() == "rectangle" :
      shape = 0.5
   elif var.get() == "triangle" :
      shape = 0.5
   elif var.get() == "sawtooth" :
      type = "triangle"
      shape = 0.0
   else :
      shape = 0.0
   filt.configure(s1.get(), s2.get(), shape, type, -1)

f = tk.Frame(root)
f.pack()

s1 = tk.Scale(f, from_=4000, to=50, label="Frequency", length=200, command=config)
s1.pack(side='left')

s2 = tk.Scale(f, from_=32767, to=0, label="Amplitude", length=200, command=config)
s2.pack(side='left')

s1.set(440.0)
s2.set(20000)

var  = tk.StringVar()
var.set("sine")

menu = tk.OptionMenu(root, var, "sine", "rectangle", "triangle", "sawtooth", "noise")
menu.pack()
root.bind_all("<Button1-ButtonRelease>", config)

fb = tk.Frame(root)
fb.pack(side='bottom')
tk.Button(fb, bitmap='snackPlay', command=play).pack(side='left')
tk.Button(fb, bitmap='snackStop', command=stop).pack(side='left')

root.mainloop()