Add optional to arguments that are optional

Author: DominicOram

exporter/opentelemetry-exporter-otlp-proto-http/src/opentelemetry/exporter/otlp/proto/http/metric_exporter/__init__.py

@@ -109,8 +109,8 @@ def __init__(
         timeout: Optional[int] = None,
         compression: Optional[Compression] = None,
         session: Optional[requests.Session] = None,
-        preferred_temporality: Dict[type, AggregationTemporality] = None,
-        preferred_aggregation: Dict[type, Aggregation] = None,
+        preferred_temporality: Optional[Dict[type, AggregationTemporality]] = None,
+        preferred_aggregation: Optional[Dict[type, Aggregation]] = None,
     ):
         self._endpoint = endpoint or environ.get(
             OTEL_EXPORTER_OTLP_METRICS_ENDPOINT,

opentelemetry-sdk/src/opentelemetry/sdk/trace/export/__init__.py

@@ -155,10 +155,10 @@ class BatchSpanProcessor(SpanProcessor):
     def __init__(
         self,
         span_exporter: SpanExporter,
-        max_queue_size: int = None,
-        schedule_delay_millis: float = None,
-        max_export_batch_size: int = None,
-        export_timeout_millis: float = None,
+        max_queue_size: Optional[int] = None,
+        schedule_delay_millis: Optional[float] = None,
+        max_export_batch_size: Optional[int] = None,
+        export_timeout_millis: Optional[float] = None,
     ):
         if max_queue_size is None:
             max_queue_size = BatchSpanProcessor._default_max_queue_size()