code: def build_parser():
      parser = ArgumentParser()
      parser.add_argument(
          "--mode",
          dest="mode",
          help="start mode, train, download_data" " backtest",
          metavar="MODE",
          default="train",
      )
      return parser
  
imports: from __future__ import annotations
  import os
  from argparse import ArgumentParser
  from typing import List
  from finrl.config import ALPACA_API_BASE_URL
  from finrl.config import DATA_SAVE_DIR
  from finrl.config import ERL_PARAMS
  from finrl.config import INDICATORS
  from finrl.config import RESULTS_DIR
  from finrl.config import TENSORBOARD_LOG_DIR
  from finrl.config import TEST_END_DATE
  from finrl.config import TEST_START_DATE
  from finrl.config import TRADE_END_DATE
  from finrl.config import TRADE_START_DATE
  from finrl.config import TRAIN_END_DATE
  from finrl.config import TRAIN_START_DATE
  from finrl.config import TRAINED_MODEL_DIR
  from finrl.config_tickers import DOW_30_TICKER
  from finrl.meta.env_stock_trading.env_stocktrading_np import StockTradingEnv
label_desc: Use image node_id 1 for calling a global function with example usage: build_parser() and returns: parser