docstr: Method:
  1. create a partition
  2. load with empty rg name
docstr_tok: ["Method",":","1.","create","a","partition","2.","load","with","empty","rg","name"]
code: def test_load_partition_with_empty_rg_name(self, rg_names):
      """
      Method:
      1. create a partition
      2. load with empty rg name
      """
      self._connect()
      # 1. create a partition
      collection_w = self.init_collection_wrap()
      collection_w.create_index(
          ct.default_float_vec_field_name, ct.default_index
      )
      partition_name = cf.gen_unique_str("par")
      partition_w = self.init_partition_wrap(
          collection_w, partition_name
      )
  
      error = {
          ct.err_code: 1,
          ct.err_msg: "failed to load partitions, err=failed to spawn replica for collection[resource num can only be 0, 1 or same as replica number]",
      }
      partition_w.load(
          _resource_groups=rg_names,
          check_task=CheckTasks.err_res,
          check_items=error,
      )
  
imports: import pytest
  from base.client_base import TestcaseBase
  from common import common_func
  from common import common_type
  from common.common_type import CaseLabel, CheckTasks
  from utils.util_pymilvus import *
label_desc: Use image node_id 10 for calling the TestTransferNode obj's underlying member method code with example usage: obj.test_load_partition_with_empty_rg_name(rg_names) without return types