docstr: get all query nodes in Milvus deployment
docstr_tok: ["get","all","query","nodes","in","Milvus","deployment"]
code: def query_nodes(self):
      """get all query nodes in Milvus deployment"""
      query_nodes = []
      for node in self.nodes:
          if "querynode" == node.get("infos").get("type"):
              query_nodes.append(node)
      return query_nodes
  
file_path: milvus/tests/python_client/common/milvus_sys.py
imports: import ujson
  import json
  from pymilvus.grpc_gen import milvus_pb2
  from pymilvus import connections
label_desc: Use image node_id 6 for calling the MilvusSys obj's underlying member method code with example usage: obj.query_nodes() and returns: query_nodes