__init__.py 文件源码

def get_default_database(self):
        """Get the database named in the MongoDB connection URI.

        .. doctest::

          >>> uri = 'mongodb://localhost/my_database'
          >>> client = MotorClient(uri)
          >>> db = client.get_default_database()
          >>> assert db.name == 'my_database'

        Useful in scripts where you want to choose which database to use
        based only on the URI in a configuration file.
        """
        attr_name = mangle_delegate_name(
            self.__class__,
            '__default_database_name')

        default_db_name = getattr(self.delegate, attr_name)
        if default_db_name is None:
            raise pymongo.errors.ConfigurationError(
                'No default database defined')

        return self[default_db_name]