class_docstr: Log writer to write vdl records to log file.
  
  The class `LogWriter` provides APIs to create record file and add records to
  it. The class updates log file asynchronously without slowing down training.
class_docstr_tok: ["Log","writer","to","write","vdl","records","to","log","file",".","The","class","`","LogWriter","`","provides","APIs","to","create","record","file","and","add","records","to","it",".","The","class","updates","log","file","asynchronously","without","slowing","down","training","."]
code: def __exit__(self, exc_type, exc_val, exc_tb):
      self.close()
  
imports: import os
  import time
  import numpy
  from visualdl.component.base_component import audio
  from visualdl.component.base_component import embedding
  from visualdl.component.base_component import histogram
  from visualdl.component.base_component import hparam
  from visualdl.component.base_component import image
  from visualdl.component.base_component import meta_data
  from visualdl.component.base_component import pr_curve
  from visualdl.component.base_component import roc_curve
  from visualdl.component.base_component import scalar
  from visualdl.component.base_component import scalars
  from visualdl.component.base_component import text
  from visualdl.component.graph import translate_graph
  from visualdl.io import bfile
  from visualdl.server.log import logger
  from visualdl.utils.figure_util import figure_to_image
  from visualdl.utils.img_util import merge_images
  from visualdl.utils.md5_util import md5
  from visualdl.writer.record_writer import RecordFileWriter
label_desc: Use image node_id 22 for calling the LogWriter obj's underlying member method code with example usage: obj.__exit__(exc_type, exc_val, exc_tb) without return types