fix context prop example

Alex Boten · Alex Boten · commit 66d67b8fa947 · 2019-12-19T16:39:24.000-08:00
diff --git a/examples/opentelemetry-example-app/src/opentelemetry_example_app/context_propagation_example.py b/examples/opentelemetry-example-app/src/opentelemetry_example_app/context_propagation_example.py
@@ -76,8 +76,10 @@ def fetch_from_service_c() -> str:
 
 @app.route("/")
 def hello():
-    tracer = trace.tracer_source()
-    tracer.add_span_processor(BatchExportSpanProcessor(ConsoleSpanExporter()))
+    tracer = trace.tracer_source().get_tracer(__name__)
+    trace.tracer_source().add_span_processor(
+        BatchExportSpanProcessor(ConsoleSpanExporter())
+    )
     with propagation.extract(request.headers):
         # extract a baggage header
         with tracer.start_as_current_span("service-span"):
