https://datarecipe.com/save-multiple-stock-data-using-pandas-datareader-5239e40a539c

save_multiple_stock_data_using_pandas_datareader.ipynb

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    "import pandas_datareader.data as web\n",
    "import datetime\n",
    "\n",
    "def set_variables():\n",
    "  ticker_symbols = ['^GSPC', '^DJI', '^IXIC']\n",
    "  start_date = '2000-01-01'\n",
    "  end_date = '2016-06-30'\n",
    "  data_source = 'yahoo'\n",
    "  directory = './'\n",
    "  file_extension = '.csv'\n",
    "  return ticker_symbols, start_date, end_date, data_source, directory, file_extension\n",
    "\n",
    "def pull_data():\n",
    "  ticker_symbols, start_date, end_date, data_source, directory, file_extension = set_variables()\n",
    "  start = string_to_date_time(start_date)\n",
    "  end = string_to_date_time(end_date)\n",
    "  for ticker_symbol in ticker_symbols:\n",
    "    df = web.DataReader(ticker_symbol, data_source, start, end)\n",
    "    save_data(df, directory, ticker_symbol, start_date, end_date, file_extension)\n",
    "\n",
    "def string_to_date_time(s):\n",
    "  sy = int(s[:4])\n",
    "  sm = int(s[5:7])\n",
    "  sd = int(s[8:])\n",
    "  return datetime.datetime(sy, sm, sd)\n",
    "\n",
    "def save_data(df, directory, ticker_symbol, start_date, end_date, file_extension):\n",
    "  sdt = strip_hyphens(start_date)\n",
    "  edt = strip_hyphens(end_date)\n",
    "  filename = directory + ticker_symbol + '_' + sdt + '-' + edt + file_extension\n",
    "  df.to_csv(filename, index_label=\"Date\")\n",
    "\n",
    "def strip_hyphens(s):\n",
    "  return s.replace(\"-\", \"\")\n",
    "\n",
    "if __name__ == \"__main__\":\n",
    "  pull_data()"
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