code: def _strip_resource_hash(relpath):
      """Removes the first part of relpath, assuming it's a resource hash.
  
      Raises ValueError if path does not have the expected hash format.
      """
      parts = relpath.split("/")
      # If this assertion fails, the scheme used for resource caching
      # hash possibly changed (e.g. overridden to use another scheme or
      # the hash algorithm changed, etc.)
      if not re.match(r"[0-9a-f]{56}$", parts[0]):
          raise ValueError(
              f"path does not contain a resource hash {relpath}"
          )
      return os.path.sep.join(parts[1:])
  
imports: import os
  import re
  from guild import manifest
  from guild import util
  from guild import var
label_desc: Use image node_id 12 for calling a global function with example usage: _strip_resource_hash(relpath) and returns: os