code: def main(self):
      self.first_train()
      self.update_online_pred()
  
file_path: qlib/examples/online_srv/update_online_pred.py
imports: import copy
  import fire
  import qlib
  from qlib.constant import REG_CN
  from qlib.model.trainer import task_train
  from qlib.workflow.online.utils import OnlineToolR
  from qlib.tests.config import CSI300_GBDT_TASK
label_desc: Use image node_id 4 for calling the UpdatePredExample obj's underlying member method code with example usage: obj.main() without return types