For USDFF3L2Y=PYNY, what are the corresponding name in python API (i.e. tr.get_data) for
"SECOND ACTIVY 1"
For US6YT=TWEB, it has
"RT YIELD 1" and
"SEC YLD 1"
What are the corresponding field name in python API?
Besides, is there a way that I can get them as some historical day close i.e. 9/21/2018?