Automatically cast decimals in dynamodb return values

using_dacite.py

from decimal import Decimal

@dataclass
class A:
    x: str


data = {
    'x': 'TEST',
}

result = from_dict(data_class=A, data=data, config=Config(type_hooks={Decimal: int}))

using_json.py

from decimal import Decimal

dynamodb = boto3.resource("dynamodb", region_name="...").Table(...)

response = dynamodb.get_item(
    Key={
        "...": "...",
    }
)

item = json.loads(
    json.dumps(response["Item"], cls=DecimalEncoder),
    parse_float=Decimal,
)


class DecimalEncoder(json.JSONEncoder):
    def default(self, o):
        if isinstance(o, Decimal):
            return int(o)
        return super().default(o)