class_docstr: Test case of search interface 
class_docstr_tok: ["Test","case","of","search","interface"]
code: def metric_type(self, request):
      yield request.param
  
imports: import multiprocessing
  import numbers
  import random
  import numpy
  import threading
  import pytest
  import pandas
  import decimal
  from decimal import Decimal, getcontext
  from time import sleep
  import heapq
  from base.client_base import TestcaseBase
  from utils.util_log import test_log
  from common import common_func
  from common import common_type
  from common.common_type import CaseLabel, CheckTasks
  from utils.util_pymilvus import *
  from common.constants import *
  from pymilvus.orm.types import CONSISTENCY_STRONG, CONSISTENCY_BOUNDED, CONSISTENCY_SESSION, CONSISTENCY_EVENTUALLY
  from base.high_level_api_wrapper import HighLevelApiWrapper
label_desc: Use image node_id 2 for calling the TestHighLevelApi obj's underlying member method code with example usage: obj.metric_type(request) without return types