update comments

Author: weizhikuan

docs/examples/multi-destination-exporting/multi_destination_logs.py

@@ -27,6 +27,7 @@
 from opentelemetry.exporter.otlp.proto.http._log_exporter import (
     OTLPLogExporter as HttpLogExporter,
 )
+from opentelemetry.instrumentation.logging.handler import LoggingHandler
 from opentelemetry.sdk._logs import LoggerProvider
 from opentelemetry.sdk._logs.export import (
     BatchLogRecordProcessor,
@@ -57,9 +58,12 @@
     BatchLogRecordProcessor(ConsoleLogRecordExporter())
 )
 
-# Use Python's standard logging, bridged to OpenTelemetry
+# Bridge Python's logging to OpenTelemetry
+handler = LoggingHandler(level=logging.NOTSET, logger_provider=logger_provider)
+logging.getLogger().setLevel(logging.NOTSET)
+logging.getLogger().addHandler(handler)
+
 logger = logging.getLogger("myapp")
-logger.setLevel(logging.INFO)
 logger.info("Logs are exported to all three destinations.")
 logger.warning("This warning also goes everywhere.")
 

docs/examples/multi-destination-exporting/multi_destination_metrics.py

@@ -31,13 +31,17 @@
     PeriodicExportingMetricReader,
 )
 
-# Each reader has its own export interval and exporter
+# Destination 1: OTLP over gRPC
 grpc_reader = PeriodicExportingMetricReader(
     GrpcMetricExporter(endpoint="http://localhost:4317", insecure=True)
 )
+
+# Destination 2: OTLP over HTTP
 http_reader = PeriodicExportingMetricReader(
     HttpMetricExporter(endpoint="http://localhost:4318/v1/metrics")
 )
+
+# Destination 3: Console (for debugging)
 console_reader = PeriodicExportingMetricReader(ConsoleMetricExporter())
 
 # Pass all readers to the MeterProvider