class Cursor:
    def __init__(self, cursor):
        pass

    def execute(self, sql: str, params: list = None) -> None:
        pass

    def fetchone(self, sql: str, params: list = None) -> dict:
        pass

    def fetchmany(self, sql: str = None, params: list = None) -> list[dict]:
        pass

    def fetchall(self, sql: str, params: list = None) -> list[dict]:
        pass

    def lastrowid(self):
        pass


class Database:

    def __init__(self, name: str):
        self.name = name
        self.connected = False

    def commit(self):
        pass

    def cursor(self) -> Cursor:
        pass


class DBContainer:
    def __init__(self, db: Database):
        self.db: Database = db

    def switch_db(self, db: Database):
        self.db.commit()
        self.db: Database = db

    @property
    def connected(self) -> bool:
        return self.db.connected

    def commit(self):
        self.db.commit()

    def cursor(self) -> Cursor:
        return self.db.cursor()