def is_subclassable(c):
    "Magic expression provided by Daniel Urban"
    return c.__flags__ & (1 << 10)
    # try: exec(); except: TypeError; works for built-ins
    # but would be much tricker for types classes

print ("Among named builtin classes, these cannot be subclassed:")
for c in (bool, bytearray, bytes, complex, dict, enumerate, filter,
          float, frozenset, int, list, map, memoryview, object, range,
          set, slice, str, tuple, type, zip):
    if not is_subclassable(c):
        print(c.__name__, end=', ')
print()

print("Among types classes, these can be subclassed:")
import types
d = vars(types)
for key in d:
    if key[0].isupper() and is_subclassable(d[key]):
            print(key, end=', ')
print()