code: def test_1_mse(self):
      uri_path = train_mse(self.URI_PATH)
  
file_path: qlib/tests/test_contrib_workflow.py
imports: from qlib.workflow.record_temp import SignalRecord
  import shutil
  import unittest
  import pytest
  from pathlib import Path
  from qlib.contrib.workflow import MultiSegRecord, SignalMseRecord
  from qlib.utils import init_instance_by_config, flatten_dict
  from qlib.workflow import R
  from qlib.tests import TestAutoData
  from qlib.tests.config import GBDT_MODEL, get_dataset_config, CSI300_MARKET
label_desc: Use image node_id 3 for calling the TestAllFlow obj's underlying member method code with example usage: obj.test_1_mse() without return types