Fixed issue with schema in sqlite.
Fixed issue with schema in sqlite.

PyClass/PyClassLessons,noisebridge/PythonClass,razzius/PyClassLessons,noisebridge/PythonClass,PyClass/PyClassLessons,razzius/PyClassLessons,razzius/PyClassLessons,PyClass/PyClassLessons,noisebridge/PythonClass,razzius/PyClassLessons,noisebridge/PythonClass