How can I know the security type and the number of underwriters of a municipal on rdp api?

I wanna get the type of the municipal bonds, like whether it is GO or revenue, I am also trying to count how many underwriters are there in the manager group. So I made python code like this:

df1 = rdp.search(
view = rdp.SearchViews.MunicipalInstruments,
filter = fil,
top = 10000,
select = "CUSIP,SecurityType,UnderWriterAmount"
)

But I got nothing from the returned dataframe, what should I do?

Best Answer