code: def test_0_train(self):
      TestAllFlow.PRED_SCORE, ic_ric, TestAllFlow.RID, uri_path = train(
          self.URI_PATH
      )
      self.assertGreaterEqual(ic_ric["ic"].all(), 0, "train failed")
      self.assertGreaterEqual(ic_ric["ric"].all(), 0, "train failed")
  
imports: import sys
  import shutil
  import unittest
  import pytest
  from pathlib import Path
  import qlib
  from qlib.config import C
  from qlib.utils import init_instance_by_config, flatten_dict
  from qlib.workflow import R
  from qlib.workflow.record_temp import SignalRecord, SigAnaRecord, PortAnaRecord
  from qlib.tests import TestAutoData
  from qlib.tests.config import CSI300_GBDT_TASK, CSI300_BENCH
label_desc: Use image node_id 2 for calling the TestAllFlow obj's underlying member method code with example usage: obj.test_0_train() without return types