How to get sObjects without tasks?

[listy]

from pyasm.search import Search
expr = "@SEARCH(prod/asset['code','not in',@GET(sthpw/task['search_code','like','ASSET%'].search_code)])"
search = Search.eval(expr)
print(search.get_statement())

This is a good way of diagnosing exactly what the expression language is doing.

This is actually returning list of sobjects. How i can get statement from list?