python - How to type hint a class that doesn't have a static definition

Question

We have a database query API that executes an SQL string and returns a list of DBRow objects. The structure of the DBRow object is determined by the SQL query, so if for example the query was

SELECT id, name FROM tbl;

then DBRow will have id and name members, as in

print(db_row.name)

I'm not saying that this is a good API, but I'm stuck with it until we have the man resources to switch to something else, and in the meantime this is making static type checking hell. Any use of a DBRow's dynamically created members, which happens very often, causes a type error, because even though I can annotate that a function returns DBRow, the DBRow class definition doesn't have the members that executing a query will populate.

I don't want to disable warnings about missing members globally, and I don't want to reannotate all functions that return DBRow as returning Any. So what are my options?

I'm using Pyright if that helps, but am open to using another type checker as well.

question from:https://stackoverflow.com/questions/65870871/how-to-type-hint-a-class-that-doesnt-have-a-static-definition

Answer 1

Waitting for answers