docs: def code_to_sjis(code):
      u"""Convert character code(hex) to string"""
      if code and isinstance(code, basestring):
          clean_code = code.replace('>', '')
          if clean_code:
              _code_to_sjis_char = lambda c: ''.join([chr(int("%c%c"%(a, b), 16)) for a, b in izip(c[0::2], c[1::2])])
              return ''.join([_code_to_sjis_char(code_char) for code_char in clean_code.split('+') if code_char])
      return None