stocks/fa/analysis returns empty dataframe instead of error when no data #3858
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Description
Quick and unsophisticated fix for Bug #3822
Now just checks if resulting list is empty and returns empty DataFrame. In the terminal, this will trigger printing a message (filings not found) and in SDK this will just return a blank DataFrame.
No error message appears in either case but if you'd prefer some sort of message in the notebook then please say!
How has this been tested?
Tested various US and non-US tickers (and some made up tickers).
stocks -> load coin -> fa -> analysis
In terminal:

In notebook:

As expected, COIN should not return results.
Apple, however, should run just fine...
stocks -> load aapl -> fa -> analysis
In terminal:

In notebook:
