code: def _id_hash(path_tuple):
      """Compute a hash for the specific placeholder based on its path."""
      return hashlib.sha1(str(path_tuple).encode("utf-8")).hexdigest()[
          :ID_HASH_LENGTH
      ]
  
file_path: ray/python/ray/tune/impl/placeholder.py
imports: from collections import defaultdict
  import hashlib
  from typing import Any, Dict, Tuple
  from ray.tune.search.sample import Categorical, Domain, Function
  from ray.tune.search.variant_generator import assign_value
  from ray.util.annotations import DeveloperAPI
label_desc: Use image node_id 2 for calling a global function with example usage: _id_hash(path_tuple) and returns: hashlib