class_docstr: Log reader to read vdl log, support for frontend api in lib.py.
  
      
code: def _get_log_tags(self):
      component_keys = self._log_data.keys()
      log_tags = {}
      for key in component_keys:
          _tags = list(self._log_data[key].keys())
          tags = list(map(lambda x: encode_tag(x), _tags))
          log_tags[key] = tags
  
      return log_tags
  
imports: import collections
  import os
  from functools import partial
  from visualdl.component import components
  from visualdl.io import bfile
  from visualdl.proto import record_pb2
  from visualdl.reader.record_reader import RecordReader
  from visualdl.server.data_manager import default_data_manager
  from visualdl.utils.string_util import decode_tag
  from visualdl.utils.string_util import encode_tag
label_desc: Use image node_id 6 for calling the LogReader obj's underlying member method code with example usage: obj._get_log_tags() and returns: log_tags