def delete_item(self):
        name = self.body['TableName']
        key = self.body['Key']
        hash_key = key['HashKeyElement']
        range_key = key.get('RangeKeyElement')
        return_values = self.body.get('ReturnValues', '')
        item = dynamodb_backend.delete_item(name, hash_key, range_key)
        if item:
            if return_values in 'ALL_OLD':
                item_dict = item.to_json()
            else:
                item_dict = {'Attributes': []}
            item_dict['ConsumedCapacityUnits'] = 0.5
            return dynamo_json_dump(item_dict)
        else:
            er = 'com.amazonaws.dynamodb.v20111205#ResourceNotFoundException'
            return self.error(er)
dataset/ETHPy150Open spulec/moto/moto/dynamodb/responses.py/DynamoHandler.delete_item/operator `==` -> `in`