code: def _discover_ops():
      """Query the backend for all registered operator names, update the Python-side registry of
      operator names."""
      global _cpu_ops
      global _gpu_ops
      global _mixed_ops
      _cpu_ops = _cpu_ops.union(set(_b.RegisteredCPUOps()))
      _gpu_ops = _gpu_ops.union(set(_b.RegisteredGPUOps()))
      _mixed_ops = _mixed_ops.union(set(_b.RegisteredMixedOps()))
  
file_path: DALI/dali/python/nvidia/dali/ops/_registry.py
imports: from nvidia.dali import backend
label_desc: Use image node_id 7 for calling a global function with example usage: _discover_ops() without return types