courses.py

    course_fields = {
        'labster_demo': False,
        'is_browsable': False,
        'invitation_only': True,
        'max_student_enrollments_allowed': 3,
        'labster_license': True,
    }
    if fields:
        course_fields.update(fields)

    course = mstore.get_course(dest_course_id)
    for key, value in course_fields.items():
        setattr(course, key, value)