使用的paddledetection2.1
想通过修改callbacks.py中的Use VisualDL to log data or image部分实现恢复训练后的折线图的续写，修改LogWriter（）方法内的file_name变量没有效果，训练产生的log文件仍是默认名称。

class VisualDLWriter(Callback):

def __init__(self, model):
    super(VisualDLWriter, self).__init__(model)

    assert six.PY3, "VisualDL requires Python >= 3.5"
    try:
        from visualdl import LogWriter
    except Exception as e:
        logger.error('visualdl not found, plaese install visualdl. '
                     'for example: `pip install visualdl`.')
        raise e
    self.vdl_writer = LogWriter(
        lodir="./log/scalar",
        file_name='vdlrecords111.log')
    # self.vdl_writer = LogWriter(
    #     lodir=model.cfg.get('vdl_log_dir', 'vdl_log_dir/scalar'),
    #     file_name='vdlrecords.111')
    self.vdl_loss_step = 0
    self.vdl_mAP_step = 0
    self.vdl_image_step = 0
    self.vdl_image_frame = 0

def on_step_end(self, status):
    mode = status['mode']
    if dist.get_world_size() < 2 or dist.get_rank() == 0:
        if mode == 'train':
            training_staus = status['training_staus']
            for loss_name, loss_value in training_staus.get().items():
                # 折线图LOSS
                self.vdl_writer.add_scalar(loss_name, loss_value,
                                           self.vdl_loss_step)
                self.vdl_loss_step += 1
        elif mode == 'test':
            ori_image = status['original_image']
            result_image = status['result_image']
            # 图片可视化
            self.vdl_writer.add_image(
                "original/frame_{}".format(self.vdl_image_frame), ori_image,
                self.vdl_image_step)
            self.vdl_writer.add_image(
                "result/frame_{}".format(self.vdl_image_frame),
                result_image, self.vdl_image_step)
            self.vdl_image_step += 1
            # each frame can display ten pictures at most.
            if self.vdl_image_step % 10 == 0:
                self.vdl_image_step = 0
                self.vdl_image_frame += 1

自己想修改self.vdl_writer = LogWriter()方法，file_name='vdlrecords.111'是自己加的，想实现log文件的命名和续写，但是都没效果