class_docstr: A stock trading environment for OpenAI gym
class_docstr_tok: ["A","stock","trading","environment","for","OpenAI","gym"]
code: def save_asset_memory(self):
      date_list = self.date_memory
      asset_list = self.asset_memory
      # print(len(date_list))
      # print(len(asset_list))
      df_account_value = pd.DataFrame(
          {"date": date_list, "account_value": asset_list}
      )
      return df_account_value
  
imports: from __future__ import annotations
  from typing import List
  import gymnasium
  import matplotlib
  import matplotlib.pyplot
  import numpy
  import pandas
  from gymnasium import spaces
  from gymnasium.utils import seeding
  from stable_baselines3.common.vec_env import DummyVecEnv
label_desc: Use image node_id 12 for calling the StockTradingEnv obj's underlying member method code with example usage: obj.save_asset_memory() and returns: df_account_value