class_docstr: Operator Registry
code: def op_names():
      return list(OperatorRegistry.REGISTRY.keys())
  
imports: import types
  from typing import Any, Dict
  from towhee.operator import SharedType
  from .uri import URI
label_desc: Use image node_id 3 for calling the OperatorRegistry obj's underlying member method code with example usage: obj.op_names() and returns: list