Fix to run the Auto instrumentation example in the docs

docs/examples/auto-instrumentation/README.rst

@@ -37,9 +37,8 @@ Manually instrumented server
     def server_request():
         with tracer.start_as_current_span(
             "server_request",
-            parent=propagators.extract(
-                lambda dict_, key: dict_.get(key, []), request.headers
-            )["current-span"],
+            context=propagators.extract(DictGetter(), request.headers
+            ),
         ):
             print(request.args.get("param"))
             return "served"
@@ -148,7 +147,7 @@ and run the following command instead:
 
 .. code:: sh
 
-    $ opentelemetry-instrument python server_uninstrumented.py
+    $ opentelemetry-instrument -e 'none' python server_uninstrumented.py
 
 In the console where you previously executed ``client.py``, run the following
 command again:

docs/examples/auto-instrumentation/server_instrumented.py

@@ -21,6 +21,7 @@
     ConsoleSpanExporter,
     SimpleExportSpanProcessor,
 )
+from opentelemetry.trace.propagation.textmap import DictGetter
 
 app = Flask(__name__)
 
@@ -36,9 +37,7 @@
 def server_request():
     with tracer.start_as_current_span(
         "server_request",
-        parent=propagators.extract(
-            lambda dict_, key: dict_.get(key, []), request.headers
-        )["current-span"],
+        context=propagators.extract(DictGetter(), request.headers),
         kind=trace.SpanKind.SERVER,
         attributes=collect_request_attributes(request.environ),
     ):