Example of GeoAlchemy2 to filter query by spatial type (ST) functions

geoalchemy-st_contains.py

from geoalchemy2 import Geography, Geometry
from sqlalchemy import cast
...
class Node(db.Model):
    ....
    def get_area(self, type_key):
        try:
            return Area.query.filter(Area.type_key == type_key).filter(
                cast(Area.polygon, Geometry).ST_Contains(
                    cast(self.point, Geometry))).first() or None
        except Exception as ex:
            pass
        return None