You can try this. Don't know much about python client, still ...
validators = {'full_name': UTF8_TYPE,
'email': UTF8_TYPE,
'state': UTF8_TYPE,
'gender': UTF8_TYPE,
'birth_year': LONG_TYPE}
sys.create_column_family('TestKeyspace', 'TestCF', super=False,
comparator_type=UTF8Type,
key_validation_class=UTF8Type,
column_validation_classes=validators)