code: def pep517_backend_reference(value: str) -> bool:
      module, _, obj = value.partition(":")
      identifiers = (
          i.strip() for i in _chain(module.split("."), obj.split("."))
      )
      return all(python_identifier(i) for i in identifiers if i)
  
imports: import logging
  import os
  import re
  import string
  import typing
  from itertools import chain
label_desc: Use image node_id 4 for calling a global function with example usage: pep517_backend_reference(value) and returns: all