secref-data VS yfinance

The tickers itself are relatively easy to obtain which is the main reason I use them. However, I am aware that in due time other identifiers can be very beneficial. I am keeping my eyes on https://github.com/finos/secref-data which is going to offer exactly that, the ability to match ISIN, CIK, FIGI etc to the same company.

If you check the file here - https://github.com/ranaroussi/yfinance/blob/main/yfinance/base.py - you can see this is communicated via the "raise Exception('%s: %s' % (self.ticker, err_msg))" line. I'm trying to use the following to catch the exception but no luck.

J'utilise yfinance en Python.

You should give yfinance a try (Github)

This is cool. I’ve been playing around with plotting data as well, though I’ve used other tools, specifically yfinance to download data and gnuplot for the graphs. I think you found the easier to use graph library, but I recommend you check out yfinance for getting the data in the same script.

You might look at the yfinance module. It's done the work for you.

That's where you have APIs FundamentalAnalysis, yfinance and OpenBB for that connect very well with my database.

From the S&P Global rebalancing announcements, I pulled every company that was added and removed from the ASX200 in 2020 and made two separate portfolios of even weighting of all stocks. I then backtested, including dividends, the performance of both across the past two years with yfinance.

Well, it's not a "Yahoo! Finance" issue. yfinance is a 3rd party project and isn't associated with Yahoo!. And it's apparently a known issue that started today: https://github.com/ranaroussi/yfinance/issues/1246