code: def _parse_tensorboard_opt(opt):
      parts = opt.split("=", 1)
      if len(parts) != 2:
          cli.error(
              f"invalid TensorBoard option {opt!r} - must be OPTION=VALUE"
          )
      return parts
  
imports: import csv
  import logging
  import os
  import re
  import sys
  import time
  from guild import batch_util
  from guild import cli
  from guild import op_util
  from guild import run_util
  from guild import tfevent
  from guild import util
  from .None import runs_impl
label_desc: Use image node_id 9 for calling a global function with example usage: _parse_tensorboard_opt(opt) and returns: parts