dji ticker is not working

[ZiyiXia]

Hello, currently I got an error when running:
yf.download(tickers = "dji", interval = "1d", period = "1d")
Output:

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

1 Failed download:
- DJI: AttributeError("'NoneType' object has no attribute 'tz_convert'")

And this returns an empty dataframe.

yfinance version: 0.2.10
Python version: 3.8 on Google Colab

[ZiyiXia]

I switched the version back to 0.2.9 and didn't run into this error, is that caused by some changes in yesterday's update of 0.2.10?

[sdeibel]

If the same problem I'm running into with symbol QCSTIX while accessing fast_info['last_price'] on the ticker then the solution is to change the code in utils.py's format_history_metadata that reads:

for k in ["firstTradeDate", "regularMarketTime"]:
    if k in md:
        md[k] = _pd.to_datetime(md[k], unit='s', utc=True).tz_convert(tz)

To instead read:

for k in ["firstTradeDate", "regularMarketTime"]:
    if k in md:
        if md[k] is not None:
            md[k] = _pd.to_datetime(md[k], unit='s', utc=True).tz_convert(tz)

[ValueRaider]

@sdeibel Spot on. Would you mind submitting a pull request? I know it's simple, but it'll introduce you to process in case you want to submit other changes. Read #1084 first.

[sdeibel]

Sure. I'm traveling so a bit slow t get to this, but will try to do it soon.

[sdeibel]

OK just submitted #1411