#!/usr/bin/env python
# iso-8859-1 to utf-8 Conversion Demonstration
# by Sean B. Palmer. Creative Commons Zero

def utf8(latin1): 
   if not isinstance(latin1, str): 
      raise ValueError('Expected iso-8859-1 encoded string')

   def stream(latin1): 
      for character in latin1: 
         codepoint = ord(character)
         if codepoint < 0x80: 
            yield chr(codepoint)
         elif codepoint < 0xC0: 
            yield '\xC2' + chr(codepoint)
         else: yield '\xC3' + chr(codepoint - 64)

   utf8stream = stream(latin1)
   return ''.join(utf8stream)

def test(): 
   latin1 = ''.join(chr(c) for c in xrange(256))
   text = unicode(latin1, 'iso-8859-1')
   assert text.encode('utf-8') == utf8(latin1), 'Test Failed'
   print 'Test Succeeded'

if __name__ == '__main__': 
   test()