class_docstr: Basic in-memory dict-based object for saving Task Records.
  
  This is the first object to present the DB interface
  for logging tasks out of memory.
  
  The interface is based on MongoDB, so adding a MongoDB
  backend should be straightforward.
docstr: Check if a specific record matches tests.
docstr_tok: ["Check","if","a","specific","record","matches","tests","."]
code: def _match_one(self, rec, tests):
      """Check if a specific record matches tests."""
      for key, test in tests.items():
          if not test(rec.get(key, None)):
              return False
      return True
  
imports: import copy
  from copy import deepcopy
  from datetime import datetime
  from traitlets import Dict, Float, Integer, Unicode
  from traitlets.config.configurable import LoggingConfigurable
  from ..util import ensure_timezone
label_desc: Use image node_id 1 for calling the DictDB obj's underlying member method code with example usage: obj._match_one(rec, tests) and returns: True, False