I'm able to pull the index constituents as of a particular date, using:
df = ek.get_data('.RUT', ['TR.IndexConstituentRIC', 'TR.IndexConstituentWeightPercent'],
holdings_list = df['Constituent RIC'].str.cat(sep = ', ')
How can I use the API to pull operating metrics for all constituents while specifying the as of date and period? For example, TR.TotalRevenue, for last 12 months (or 4 quarters), as of 4/30/2022?