[2010-01] i meant to code golf numbers to words but failed

numberwords.py

#!/usr/bin/env python
# encoding: utf-8
from __future__ import division, with_statement
import sys

# http://stackoverflow.com/questions/309884/code-golf-number-to-words
# http://en.wikipedia.org/wiki/Long_and_short_scales

"""Converts numbers to words using the English short scale."""

NEGATIVE = "negative"

ZERO = "zero"

AND = "and"

DIGITS = (None, "one", "two", "three", "four",
          "five", "six", "seven", "eight", "nine")

TENS = (None, "ten", "twenty", "thirty", "fourty",
        "fifty", "sixty", "seventy", "eighty", "ninety")

HUNDRED = "hundred"

ORDERS = (None, "thousand", "million", "billion", "trillion",
          "quadrillion", "quintillion", "sextillion", "septillion",
          "octillion", "nonillion", "decillion", "undecillion",
          "duodecillion", "tredecillion", "quattuordecillion",
          "quindecillion", "sexdecillion", "septendecillion",
          "octodecillion", "novemdecillion ", "vigintillion")

class Error(Exception):
	"""Base exception for all defined in this module."""

class NotIntegerError(ValueError, Error):
	pass

def _underOneThousand(number):
	"""Returns a number in the range of 1-999 converted to words!"""
	
	if not (0 < number < 1000):
		raise(Error("WTF"))
	
	parts = []
		
	hundreds = number // 100
	tens = (number % 100) // 10
	ones = (number % 10)
	
	if hundreds:
		parts.append(DIGITS[hundreds])
		parts.append(" ")
		parts.append(HUNDRED)
		number -= number // 100
		
		if tens or ones:
			parts.append(" ")
			parts.append(AND)
			parts.append(" ")
	
	if tens:
		parts.append(TENS[number // 10])
	
	if ones:
		if tens:
			parts.append("-")
		parts.append(DIGITS[ones])
	
	return("".join(parts))

def toWords(number):
	"""Converts a number to words using the English short scale."""
	
	if number == 0:
		return ZERO
	
	parts = []
	
	if number < 0:
		parts.append(NEGATIVE)
		number *= -1
	
	# parts.append(DIGITS[number])
	parts.append(_underOneThousand(number))
	
	return "".join(parts)

wordtest.py

#!/usr/bin/env python
# encoding: utf-8
from __future__ import division, with_statement
import sys
import numberwords
import unittest

"""Unit test for numberwords.py."""

class KnownValues(unittest.TestCase):
	knownValues = (
		(0, "zero"),
		(1, "one"),
		(2, "two"),
		(3, "three"),
		(4, "four"),
		(5, "five"),
		(6, "six"), 
		(7, "seven"),
		(8, "eight"),
		(9, "nine"),
		(10, "ten"),
		# (11, "eleven"),
		# (12, "tweleve"),
		# (13, "thirteen"),
		# (14, "fourteen"),
		# (15, "fifteen"),
		# (16, "sixteen"),
		# (17, "seventeen"),
		# (18, "eighteen"),
		# (19, "nineteen"),
		(20, "twenty"),
		(21, "twenty-one"),
		(22, "twenty-two"),
		(23, "twenty-three"),
		(24, "twenty-four"),
		(25, "twenty-five"),
		(26, "twenty-six"),
		(27, "twenty-seven"),
		(28, "twenty-eight"),
		(29, "twenty-nine"),
		(30, "thirty"),
		(35, "thirty-five"),
		(40, "fourty"),
		(42, "fourty-two"),
		(50, "fifty"),
		(51, "fifty-one"),
		(60, "sixty"),
		(64, "sixty-four"),
		(70, "seventy"),
		(72, "seventy-two"),
		(80, "eighty"),
		(89, "eighty-nine"),
		(90, "ninety"),
		(99, "ninety-nine"),
		(100, "one hundred"),
		(101, "one hundred and one"),
		(102, "one hundred and two"),
		# (111, "one hundred and eleven"),
		(123, "one hundred and twenty-three"),
		(256, "two hundred and fifty-six"),
	)
	
	def testKnownValues(self):
		for number, words in self.knownValues:
			"""Function should correctly respond to known values."""
			
			result = numberwords.toWords(number)
			
			print(result)
			self.assertEqual(result, words)

class BadInput(unittest.TestCase):
	pass

def main(*args):
	unittest.main(argv=[sys.argv[0], "-v"])

if __name__ == "__main__": sys.exit(main(*sys.argv[1:]))