code: def find_tzfile(key):
      """Retrieve the path to a TZif file from a key."""
      _validate_tzfile_path(key)
      for search_path in TZPATH:
          filepath = os.path.join(search_path, key)
          if os.path.isfile(filepath):
              return filepath
  
      return None
  
file_path: catboost/contrib/tools/python3/src/Lib/zoneinfo/_tzpath.py
imports: import os
  import sysconfig
label_desc: Use image node_id 4 for calling a global function with example usage: find_tzfile(key) and returns: None, filepath