code: def __init__(
      self,
      instruments="csi300",
      start_time=None,
      end_time=None,
      infer_processors=[],
      learn_processors=[],
      fit_start_time=None,
      fit_end_time=None,
      drop_raw=True,
  ):
      infer_processors = check_transform_proc(
          infer_processors, fit_start_time, fit_end_time
      )
      learn_processors = check_transform_proc(
          learn_processors, fit_start_time, fit_end_time
      )
  
      data_loader = {
          "class": "QlibDataLoader",
          "kwargs": {
              "freq": "day",
              "config": self.get_feature_config(),
              "swap_level": False,
          },
      }
  
      super().__init__(
          instruments=instruments,
          start_time=start_time,
          end_time=end_time,
          data_loader=data_loader,
          infer_processors=infer_processors,
          learn_processors=learn_processors,
          drop_raw=drop_raw,
      )
  
file_path: qlib/tests/data_mid_layer_tests/test_handler_storage.py
imports: import unittest
  import time
  import numpy
  from qlib.data import D
  from qlib.tests import TestAutoData
  from qlib.data.dataset.handler import DataHandlerLP
  from qlib.contrib.data.handler import check_transform_proc
  from qlib.log import TimeInspector
label_desc: Use image node_id 1 to create a new TestHandler object from inherited base classes: DataHandlerLP with example: obj = TestHandler(instruments, start_time, end_time, infer_processors, learn_processors, fit_start_time, fit_end_time, drop_raw)