code: def process_placement_to_address(
      pg_name: str, bundle_index: int, process_index: int = 0
  ):
      return f"ray://{pg_name}/{bundle_index}/{process_index}"
  
file_path: mars/mars/oscar/backends/ray/utils.py
imports: import asyncio
  import enum
  import logging
  import os
  import posixpath
  from urllib.parse import urlparse, unquote
  from ....utils import lazy_import, lazy_import_on_load
label_desc: Use image node_id 5 for calling a global function with example usage: process_placement_to_address(pg_name, bundle_index, process_index) and returns: str, pg_name, str, bundle_index, str, process_index