| import sqlalchemy | |
| import sqlalchemy.orm | |
| class Database(object): | |
| """ | |
| The base engine encapsulating access to a particular database. | |
| """ | |
| # Get a cached database instance. | |
| @classmethod | |
| def get_database(cls, path): | |
| db = cls._databases.get(path) | |
| if db is None: | |
| cls._databases[path] = db = Database(path) | |
| return db | |
| _databases = {} | |
| def __init__(self, db_path): | |
| self.engine = sqlalchemy.create_engine("sqlite:///" + db_path) | |
| self.session_factory = sqlalchemy.orm.sessionmaker(bind=self.engine) |