def METHOD_NAME(self, data):
    """ProcessProtocol override"""
    self._err += data.decode('utf8')
    while '\n' in self._err:
        idx = self._err.find('\n')
        line = self._err[:idx]
        self._err = self._err[idx + 1:]
        sys.stderr.write(self.prefix + self.color + line + Fore.RESET + '\n')