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Numbernator - From integers to words.

alvations Nov 10th, 2012 685 Never
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  1. import codecs
  2.  
  3. def num2word (num):
  4.   ones = {1:"one",2:"two",3:"three",4:"four",
  5.           5:"five",6:"six",7:"seven",8:"eight",
  6.           9:"nine",0:"zero",10:"ten"}
  7.   teens = {11:"eleven",12:"twelve",13:"thirteen",
  8.            14:"fourteen",15:"fifteen"}
  9.   tens = {2:"twenty",3:"thirty",4:"forty",
  10.           5:"fifty",6:"sixty",7:"seventy",
  11.           8:"eighty",9:"ninety"}
  12.   lens = {3:"hundred",4:"thousand",6:"hundred",7:"million",
  13.           8:"million", 9:"million",10:"billion"#,13:"trillion",11:"googol",
  14.           }
  15.  
  16.   if num > 999999999:
  17.     return "Number more than 1 billion"
  18.  
  19.   # Ones
  20.   if num < 11:
  21.     return ones[num]
  22.   # Teens
  23.   if num < 20:
  24.     word = ones[num%10] + "teen" if num > 15 else teens[num]
  25.     return word
  26.   # Tens
  27.   if num > 19 and num < 100:
  28.     word = tens[int(str(num)[0])]
  29.     if str(num)[1] == "0":
  30.       return word
  31.     else:
  32.       word = word + " " + ones[num%10]
  33.       return word
  34.  
  35.   # First digit for thousands,hundred-thousands.
  36.   if len(str(num)) in lens and len(str(num)) != 3:
  37.     word = ones[int(str(num)[0])] + " " + lens[len(str(num))]
  38.   else:
  39.     word = ""
  40.    
  41.   # Hundred to Million  
  42.   if num < 1000000:
  43.     # First and Second digit for ten thousands.  
  44.     if len(str(num)) == 5:
  45.       word = num2word(int(str(num)[0:2])) + " thousand"
  46.     # How many hundred-thousand(s).
  47.     if len(str(num)) == 6:
  48.       word = word + " " + num2word(int(str(num)[1:3])) + \
  49.             " " + lens[len(str(num))-2]
  50.     # How many hundred(s)?
  51.     thousand_pt = len(str(num)) - 3
  52.     word = word + " " + ones[int(str(num)[thousand_pt])] + \
  53.             " " + lens[len(str(num))-thousand_pt]
  54.     # Last 2 digits.
  55.     last2 = num2word(int(str(num)[-2:]))
  56.     if last2 != "zero":
  57.       word = word + " and " + last2
  58.     word = word.replace(" zero hundred","")
  59.     return word.strip()
  60.  
  61.   left, right = '',''  
  62.   # Less than 1 million.
  63.   if num < 100000000:
  64.     left = num2word(int(str(num)[:-6])) + " " + lens[len(str(num))]
  65.     right = num2word(int(str(num)[-6:]))
  66.   # From 1 million to 1 billion.
  67.   if num > 100000000 and num < 1000000000:
  68.     left = num2word(int(str(num)[:3])) +  " " + lens[len(str(num))]
  69.     right = num2word(int(str(num)[-6:]))
  70.   if int(str(num)[-6:]) < 100:
  71.     word = left + " and " + right
  72.   else:  
  73.     word = left + " " + right
  74.   word = word.replace(" zero hundred","").replace(" zero thousand"," thousand")
  75.   return word
  76.  
  77. print num2word(int(raw_input("Give me a number:\n")))
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