Generate partially randomized filenames for log files.

        Args:
            name (str): descriptive string for this log file.
            redirect_output (bool): True if files should be generated for
                logging stdout and stderr and false if stdout and stderr
                should not be redirected.
                If it is None, it will use the "redirect_output" Ray parameter.

        Returns:
            If redirect_output is true, this will return a tuple of two
                file handles. The first is for redirecting stdout and the
                second is for redirecting stderr.
                If redirect_output is false, this will return a tuple
                of two None objects.

def new_log_files(self, name, redirect_output=True):
        """Generate partially randomized filenames for log files.

        Args:
            name (str): descriptive string for this log file.
            redirect_output (bool): True if files should be generated for
                logging stdout and stderr and false if stdout and stderr
                should not be redirected.
                If it is None, it will use the "redirect_output" Ray parameter.

        Returns:
            If redirect_output is true, this will return a tuple of two
                file handles. The first is for redirecting stdout and the
                second is for redirecting stderr.
                If redirect_output is false, this will return a tuple
                of two None objects.
        """
        if redirect_output is None:
            redirect_output = self._ray_params.redirect_output
        if not redirect_output:
            return None, None

        log_stdout = self._make_inc_temp(
            suffix=".out", prefix=name, directory_name=self._logs_dir)
        log_stderr = self._make_inc_temp(
            suffix=".err", prefix=name, directory_name=self._logs_dir)
        # Line-buffer the output (mode 1).
        log_stdout_file = open(log_stdout, "a", buffering=1)
        log_stderr_file = open(log_stderr, "a", buffering=1)
        return log_stdout_file, log_stderr_file