[Python] Which code should go in place of %%%% to create a correct way to import all the FRED tickers at once from January 1st, 2010, through December 31st, 2020? frmDate = "2010-01-01" toDate = "2020-12-31" frmDate = "2010-01-01" toDate = "2021-1-1" frmDate = "January 1st, 2010" toDate = "December 31st 2020" frmDate = "December 31st, 2019" toDate = "January 1st 2021".