docstr: Insert or update the current run entry.
docstr_tok: ["Insert","or","update","the","current","run","entry","."]
code: def save(self):
      """Insert or update the current run entry."""
      if self.db_run_id:
          self.runs.update(self.run_entry, doc_ids=[self.db_run_id])
      else:
          db_run_id = self.runs.insert(self.run_entry)
          self.db_run_id = db_run_id
  
imports: from __future__ import division, print_function, unicode_literals, absolute_import
  import os
  import textwrap
  import uuid
  from collections import OrderedDict
  import warnings
  from sacred.__about__ import __version__
  from sacred.commandline_options import cli_option
  from sacred.observers import RunObserver
label_desc: Use image node_id 4 for calling the TinyDbObserver obj's underlying member method code with example usage: obj.save() without return types