Error encountered when running tutorial notebook on Google colab

[RandyChen233]

Hi,

I tried running the tutorial in Google colab (the first tutorial notebook), and everything at the beginning ran without errors until this line

df = YahooDownloader(start_date = TRAIN_START_DATE,
                     end_date = TRADE_END_DATE,
                     ticker_list = config_tickers.DOW_30_TICKER).fetch_data()

I'm getting the following error:

[*********************100%***********************]  1 of 1 completed

1 Failed download:
- AXP: No data found for this date range, symbol may be delisted
[*********************100%***********************]  1 of 1 completed

1 Failed download:
- AMGN: No data found for this date range, symbol may be delisted
[*********************100%***********************]  1 of 1 completed

1 Failed download:
- AAPL: No data found for this date range, symbol may be delisted
[*********************100%***********************]  1 of 1 completed

1 Failed download:
- BA: No data found for this date range, symbol may be delisted
[*********************100%***********************]  1 of 1 completed

1 Failed download:
- CAT: No data found for this date range, symbol may be delisted
[*********************100%***********************]  1 of 1 completed

1 Failed download:
- CSCO: No data found for this date range, symbol may be delisted
[*********************100%***********************]  1 of 1 completed

1 Failed download:
- CVX: No data found for this date range, symbol may be delisted
[*********************100%***********************]  1 of 1 completed

1 Failed download:
- GS: No data found for this date range, symbol may be delisted
[*********************100%***********************]  1 of 1 completed

1 Failed download:
- HD: No data found for this date range, symbol may be delisted
[*********************100%***********************]  1 of 1 completed

1 Failed download:
- HON: No data found for this date range, symbol may be delisted
[*********************100%***********************]  1 of 1 completed

1 Failed download:
- IBM: No data found for this date range, symbol may be delisted
[*********************100%***********************]  1 of 1 completed

1 Failed download:
- INTC: No data found for this date range, symbol may be delisted
[*********************100%***********************]  1 of 1 completed

1 Failed download:
- JNJ: No data found for this date range, symbol may be delisted
[*********************100%***********************]  1 of 1 completed

1 Failed download:
- KO: No data found for this date range, symbol may be delisted
[*********************100%***********************]  1 of 1 completed

1 Failed download:
- JPM: No data found for this date range, symbol may be delisted
[*********************100%***********************]  1 of 1 completed

1 Failed download:
- MCD: No data found for this date range, symbol may be delisted
[*********************100%***********************]  1 of 1 completed

1 Failed download:
- MMM: No data found for this date range, symbol may be delisted
[*********************100%***********************]  1 of 1 completed

1 Failed download:
- MRK: No data found for this date range, symbol may be delisted
[*********************100%***********************]  1 of 1 completed

1 Failed download:
- MSFT: No data found for this date range, symbol may be delisted
[*********************100%***********************]  1 of 1 completed

1 Failed download:
- NKE: No data found for this date range, symbol may be delisted
[*********************100%***********************]  1 of 1 completed

1 Failed download:
- PG: No data found for this date range, symbol may be delisted
[*********************100%***********************]  1 of 1 completed

1 Failed download:
- TRV: No data found for this date range, symbol may be delisted
[*********************100%***********************]  1 of 1 completed

1 Failed download:
- UNH: No data found for this date range, symbol may be delisted
[*********************100%***********************]  1 of 1 completed

1 Failed download:
- CRM: No data found for this date range, symbol may be delisted
[*********************100%***********************]  1 of 1 completed

1 Failed download:
- VZ: No data found for this date range, symbol may be delisted
[*********************100%***********************]  1 of 1 completed

1 Failed download:
- V: No data found for this date range, symbol may be delisted
[*********************100%***********************]  1 of 1 completed

1 Failed download:
- WBA: No data found for this date range, symbol may be delisted
[*********************100%***********************]  1 of 1 completed

1 Failed download:
- WMT: No data found for this date range, symbol may be delisted
[*********************100%***********************]  1 of 1 completed

1 Failed download:
- DIS: No data found for this date range, symbol may be delisted
[*********************100%***********************]  1 of 1 completed

1 Failed download:
- DOW: No data found for this date range, symbol may be delisted
---------------------------------------------------------------------------
ValueError                                Traceback (most recent call last)
[<ipython-input-50-b49b1e107d2c>](https://localhost:8080/#) in <cell line: 1>()
----> 1 df = YahooDownloader(start_date = TRAIN_START_DATE,
      2                      end_date = TRADE_END_DATE,
      3                      ticker_list = config_tickers.DOW_30_TICKER).fetch_data()

[/usr/local/lib/python3.9/site-packages/finrl/meta/preprocessor/yahoodownloader.py](https://localhost:8080/#) in fetch_data(self, proxy)
     58                 num_failures += 1
     59         if num_failures == len(self.ticker_list):
---> 60             raise ValueError("no data is fetched.")
     61         # reset the index, we want to use numbers as index instead of dates
     62         data_df = data_df.reset_index()

ValueError: no data is fetched.

Is yahooDownloader broken?

[zhumingpassional]

have you clicked the icon "open in colab"?