[pygame] getting what an user has written

[110110010 <Josef.Horn@xxxxxxxxx>]

Hello. I use this script in a class to get the string what user had written:
string.string=u""
strfont=pygame.font.Font(None,16)
for udalost in pygame.event.get():
          if udalost.type == KEYDOWN:
            if udalost.key == K_RETURN: exit=1
            elif udalost.key == K_BACKSPACE: 
              self.string=self.string[:-1]
              text=strfont.render(self.string,0,(0,0,0))
            elif not strfont.size(self.string+udalost.unicode)[0]>mw-8:
              self.string+=udalost.unicode
              text=strfont.render(self.string,0,(0,0,0))

Everything works fine except that i get unicode string in another encoding, which I don't want. Can somebody tell me which coding pygame uses and/or how to translate it to utf-8 encoding?