[Python] Support for Enum arguments in argparse

Is there a better way of supporting Enums as types of argparse arguments than this pattern?

class SomeEnum(Enum):
ONE = 1
TWO = 2

parser.add_argument('some_val', type=str, default='one',
choices=[i.name.lower() for i in SomeEnum])
...
args.some_val = SomeEnum[args.some_val.upper()]

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