code: def _get_wandb_project(
      project: Optional[str] = None,
  ) -> Optional[str]:
      """Get W&B project from environment variable or external hook if not passed
      as and argument."""
      if (
          not project
          and not os.environ.get(WANDB_PROJECT_ENV_VAR)
          and os.environ.get(WANDB_POPULATE_RUN_LOCATION_HOOK)
      ):
          # Try to populate WANDB_PROJECT_ENV_VAR and WANDB_GROUP_ENV_VAR
          # from external hook
          try:
              _load_class(
                  os.environ[WANDB_POPULATE_RUN_LOCATION_HOOK]
              )()
          except Exception as e:
              logger.exception(
                  f"Error executing {WANDB_POPULATE_RUN_LOCATION_HOOK} to "
                  f"populate {WANDB_PROJECT_ENV_VAR} and {WANDB_GROUP_ENV_VAR}: {e}",
                  exc_info=e,
              )
      if not project and os.environ.get(WANDB_PROJECT_ENV_VAR):
          # Try to get project and group from environment variables if not
          # passed through WandbLoggerCallback.
          project = os.environ.get(WANDB_PROJECT_ENV_VAR)
      return project
  
imports: import enum
  import os
  import pickle
  import urllib
  import warnings
  import numpy
  from numbers import Number
  import pyarrow.fs
  from types import ModuleType
  from typing import Any, Dict, List, Optional, Sequence, Tuple, Union
  import ray
  from ray import logger
  from ray.air import session
  from ray.air._internal import usage
  from ray.air.util.node import _force_on_current_node
  from ray.tune.logger import LoggerCallback
  from ray.tune.utils import flatten_dict
  from ray.tune.experiment import Trial
  from ray.train._internal.syncer import DEFAULT_SYNC_TIMEOUT
  from ray._private.storage import _load_class
  from ray.util import PublicAPI
  from ray.util.queue import Queue
label_desc: Use image node_id 5 for calling a global function with example usage: _get_wandb_project(project) and returns: project