When I run this code in Python:
...
index = '.STOXX'
DateR='2018-12-31'
df,err = ek.get_data('{}{}({})'.format('0#', index, DateR), fields=['TR.TRESGCScore'],
parameters={'SDate': '{}'.format(DateR), 'Period': 'FY0'})
...
Python returns N/A for some instruments like BOUY.PA. However the DIB of the same date and instrument reports 64.44.
How can I obtain the right historical ESGC Score in my Python request for all instruments into an index at a specific date?