Fix lint

Author: sroda

instrumentation/opentelemetry-instrumentation-tornado/src/opentelemetry/instrumentation/tornado/__init__.py

@@ -366,6 +366,8 @@ def _log_exception(instrumentation, func, handler, args, kwargs):
     if len(args) == 3:
         error = args[1]
 
+    _record_on_finish_metrics(instrumentation, handler, error)
+
     _finish_span(instrumentation, handler, error)
     return func(*args, **kwargs)
 
@@ -535,11 +537,15 @@ def _record_prepare_metrics(instrumentation, handler):
     )
 
 
-def _record_on_finish_metrics(instrumentation, handler):
+def _record_on_finish_metrics(instrumentation, handler, error=None):
     elapsed_time = round((default_timer() - instrumentation.start_time) * 1000)
 
     response_size = int(handler._headers.get("Content-Length", 0))
     metric_attributes = _create_metric_attributes(handler)
+
+    if isinstance(error, tornado.web.HTTPError):
+        metric_attributes[SpanAttributes.HTTP_STATUS_CODE] = error.status_code
+
     instrumentation.response_size_histogram.record(
         response_size, attributes=metric_attributes
     )

instrumentation/opentelemetry-instrumentation-tornado/tests/test_metrics_instrumentation.py

@@ -41,7 +41,7 @@ def get_sorted_metrics(self):
         )
         for metrics in resource_metrics:
             for scope_metrics in metrics.scope_metrics:
-                all_metrics = [metric for metric in scope_metrics.metrics]
+                all_metrics = list(scope_metrics.metrics)
                 return self.sorted_metrics(all_metrics)
 
     @staticmethod
@@ -54,7 +54,7 @@ def sorted_metrics(metrics):
             key=lambda m: m.name,
         )
 
-    def assertMetricExpected(
+    def assert_metric_expected(
         self, metric, expected_value, expected_attributes
     ):
         data_point = next(metric.data.data_points)
@@ -75,7 +75,7 @@ def assertMetricExpected(
             dict(data_point.attributes),
         )
 
-    def assertDurationMetricExpected(
+    def assert_duration_metric_expected(
         self, metric, duration_estimated, expected_attributes
     ):
         data_point = next(metric.data.data_points)
@@ -130,7 +130,7 @@ def test_basic_metrics(self):
         self.assertEqual(
             server_active_request.name, "http.server.active_requests"
         )
-        self.assertMetricExpected(
+        self.assert_metric_expected(
             server_active_request,
             0,
             {
@@ -143,7 +143,7 @@ def test_basic_metrics(self):
         )
 
         self.assertEqual(server_duration.name, "http.server.duration")
-        self.assertDurationMetricExpected(
+        self.assert_duration_metric_expected(
             server_duration,
             client_duration_estimated,
             {
@@ -157,7 +157,7 @@ def test_basic_metrics(self):
         )
 
         self.assertEqual(server_request_size.name, "http.server.request.size")
-        self.assertMetricExpected(
+        self.assert_metric_expected(
             server_request_size,
             0,
             {
@@ -173,7 +173,7 @@ def test_basic_metrics(self):
         self.assertEqual(
             server_response_size.name, "http.server.response.size"
         )
-        self.assertMetricExpected(
+        self.assert_metric_expected(
             server_response_size,
             len(response.body),
             {
@@ -187,7 +187,7 @@ def test_basic_metrics(self):
         )
 
         self.assertEqual(client_duration.name, "http.client.duration")
-        self.assertDurationMetricExpected(
+        self.assert_duration_metric_expected(
             client_duration,
             client_duration_estimated,
             {
@@ -198,7 +198,7 @@ def test_basic_metrics(self):
         )
 
         self.assertEqual(client_request_size.name, "http.client.request.size")
-        self.assertMetricExpected(
+        self.assert_metric_expected(
             client_request_size,
             0,
             {
@@ -211,7 +211,7 @@ def test_basic_metrics(self):
         self.assertEqual(
             client_response_size.name, "http.client.response.size"
         )
-        self.assertMetricExpected(
+        self.assert_metric_expected(
             client_response_size,
             len(response.body),
             {