code: def ticker_list():
      return ["AAPL", "GOOG"]
  
file_path: FinRL/unit_tests/environments/test_cash_penalty.py
imports: from __future__ import annotations
  import numpy
  import pytest
  from finrl.meta.env_stock_trading.env_stocktrading_cashpenalty import StockTradingEnvCashpenalty
  from finrl.meta.preprocessor.yahoodownloader import YahooDownloader
label_desc: Use image node_id 1 for calling a global function with example usage: ticker_list() and returns: list