Convert an integer into a spoken number.

numconv

#!/usr/bin/env python
# Number to name convertion.

import sys

n = (sys.argv[1] if sys.argv[1].isdigit() else 0) if len(sys.argv)>1 else 0

if len(n)>30:
	print("Error: Number too large.")
	sys.exit(1)

def trip(n):
	n = int(n)
	t = int(n%100/10)
	h = int(n%1000/100)
	o = n%100 if n%100<20 else n%10
	s = ["one","two","three","four","five","six",
	     "seven","eight","nine","ten","eleven","twelve","thirteen",
	     "fourteen","fifteen","sixteen","seventeen","eighteen","nineteen"]
	m = ["twenty","thirty","fourty","fifty","sixty","seventy","eighty","ninety"]

	return	(s[h-1]+" hundred and " if h>0 else "")+(m[t-2] if t>1 else "")+ \
		(" " if t>1 and o>0 else "")+(s[o-1] if o>0 else "")

def conv(n):
	n = int(n)
	if n<1: return "Zero."

	a = [trip(s) for s in [int(n%(1000**d)/(1000**(d-1))) for d in range(1,11)] if s>0]
	l = ["","thousand","million","billion","trillion","quadrillion",
	     "pentillion","hexillion","septillion","octillion"]
	s = [a[0]+"."]+[a[i]+" "+l[i]+", " for i in range(1,len(a))]
	s = "".join(s[::-1])

	return s[0].upper()+s[1:]

print(conv(n))