code: def register_cpu_op(name):
      """Add new CPU op name to the registry."""
      global _cpu_ops
      _cpu_ops = _cpu_ops.union({name})
  
file_path: DALI/dali/python/nvidia/dali/ops/_registry.py
imports: from nvidia.dali import backend
label_desc: Use image node_id 5 for calling a global function with example usage: register_cpu_op(name) without return types