fix(parameters): appconfig transform and return types

aws_lambda_powertools/metrics/metric.py

@@ -1,7 +1,7 @@
 import json
 import logging
 from contextlib import contextmanager
-from typing import Dict, Optional, Union, Generator
+from typing import Dict, Generator, Optional, Union
 
 from .base import MetricManager, MetricUnit
 
@@ -61,7 +61,9 @@ def add_metric(self, name: str, unit: Union[MetricUnit, str], value: float) -> N
 
 
 @contextmanager
-def single_metric(name: str, unit: MetricUnit, value: float, namespace: Optional[str] = None) -> Generator[SingleMetric, None, None]:
+def single_metric(
+    name: str, unit: MetricUnit, value: float, namespace: Optional[str] = None
+) -> Generator[SingleMetric, None, None]:
     """Context manager to simplify creation of a single metric
 
     Example

aws_lambda_powertools/utilities/parameters/appconfig.py

@@ -84,7 +84,7 @@ def __init__(
 
         super().__init__()
 
-    def _get(self, name: str, **sdk_options) -> str:
+    def _get(self, name: str, **sdk_options) -> bytes:
         """
         Retrieve a parameter value from AWS App config.