exist = (
            session.query(PictureLike)
            .filter(
                PictureLike.android_id == android_id,
                PictureLike.picture_id == picture_id,
            )
            .exists()
        )		
		
			

输出结果

		
EXISTS (SELECT 1 
FROM picture_like 
WHERE picture_like.android_id = :android_id_1 AND picture_like.picture_id = :picture_id_1)		
		
			

		
from sqlalchemy import exists

it_exists = Session.query(
    exists().where( SomeObject.field==value )
).scalar()		
		
			

			
        query = session.query(PictureLike).filter(
            PictureLike.android_id == android_id,
            PictureLike.picture_id == picture_id,
        )
        print(f"SQL: {query}")
        exists = session.query(query.exists()).scalar()
        print(exists)