code: def style_ansi(raw_code, lang=None):
      
      lexer = 0
      if lang:
          try:
              lexer = get_lexer_by_name(lang)
          except ValueError:
              print col(R, 'Lexer for %s not found' % lang)
      lexer = None
      if not lexer:
          try:
              if guess_lexer:
                  lexer = pyg_guess_lexer(raw_code)
          except:
              pass
      if not lexer:
          lexer = get_lexer_by_name(def_lexer)
      tokens = lex(raw_code, lexer)
      cod = []
      for t, v in tokens:
          if not v:
              continue
          _col = code_hl_tokens.get(t)
          if _col:
              cod.append(col(v, _col))
          else:
              cod.append(v)
      return ''.join(cod)
docs: actual code hilite