Null values in attributes not supported?

I’m getting error trying to bulk insert via python. ({“error”:"unable to parse: NaN)

I then found this older thread:

So I wonder if this still is the case? I can’t set attributes to null? This can be for string attributes or numeric ones. Can I instead omit them in the insert command?

you could omit attributes in the insert - this way they get to default values (numeric to 0).
However plain attribute can not have null - only JSON attributes could be null