Your Question: How do I pull historical open interest in eikon python api? I found the code in excel NDA_RAW.Nda_open_interest. But this field does not work in python
ek.get_timeseries([TYH8^1],[NDA_RAW.Nda_open_interest],start_date = '2018-01-01',end_date = '2018-04-01')
returns NaN