The objective of a ABC metaclass is that can assist you detect gaps as part of your implementation; it under no circumstances was meant to enforce the categories of your characteristics. Fields are the sole mechanism how to keep info on course degree. Fields are conceptually variables at class scope. https://centralparksector104.co.in/central-park-104-sector-104-gurgaon-a-new-benchmark-in-luxury-living-on-dwarka-expressway/