Multi-Level Column Index

The following answer on Stack Overflow is for How to deal with multi-level column names downloaded with yfinance?

• yfinance returns a pandas.DataFrame with multi-level column names, with a level for the ticker and a level for the stock price data

The answer discusses:

• How to correctly read the the multi-level columns after saving the dataframe to a csv with pandas.DataFrame.to_csv

• How to download single or multiple tickers into a singledataframe with single level column names and a ticker column