Fix linting errors

tracetools_test/test/test_node.py

@@ -1,8 +1,9 @@
 import unittest
+
 from tracetools_test.utils import (
+    cleanup_trace,
     get_trace_event_names,
     run_and_trace,
-    cleanup_trace,
 )
 
 BASE_PATH = '/tmp'
@@ -12,6 +13,7 @@ node_creation_events = [
     'ros2:rcl_node_init',
 ]
 
+
 class TestNode(unittest.TestCase):
 
     def test_creation(self):

tracetools_test/test/test_publisher.py

@@ -1,8 +1,9 @@
 import unittest
+
 from tracetools_test.utils import (
+    cleanup_trace,
     get_trace_event_names,
     run_and_trace,
-    cleanup_trace,
 )
 
 BASE_PATH = '/tmp'
@@ -11,6 +12,7 @@ publisher_creation_events = [
     'ros2:rcl_publisher_init',
 ]
 
+
 class TestPublisher(unittest.TestCase):
 
     def test_creation(self):

tracetools_test/test/test_service.py

@@ -1,8 +1,9 @@
 import unittest
+
 from tracetools_test.utils import (
+    cleanup_trace,
     get_trace_event_names,
     run_and_trace,
-    cleanup_trace,
 )
 
 BASE_PATH = '/tmp'
@@ -12,6 +13,7 @@ service_creation_events = [
     'ros2:rclcpp_service_callback_added',
 ]
 
+
 class TestService(unittest.TestCase):
 
     def test_creation(self):

tracetools_test/test/test_service_callback.py

@@ -1,8 +1,9 @@
 import unittest
+
 from tracetools_test.utils import (
+    cleanup_trace,
     get_trace_event_names,
     run_and_trace,
-    cleanup_trace,
 )
 
 BASE_PATH = '/tmp'
@@ -12,6 +13,7 @@ service_callback_events = [
     'ros2:rclcpp_service_callback_end',
 ]
 
+
 class TestServiceCallback(unittest.TestCase):
 
     def test_callback(self):

tracetools_test/test/test_subscription.py

@@ -1,8 +1,9 @@
 import unittest
+
 from tracetools_test.utils import (
+    cleanup_trace,
     get_trace_event_names,
     run_and_trace,
-    cleanup_trace,
 )
 
 BASE_PATH = '/tmp'
@@ -12,6 +13,7 @@ subscription_creation_events = [
     'ros2:rclcpp_subscription_callback_added',
 ]
 
+
 class TestSubscription(unittest.TestCase):
 
     def test_creation(self):

tracetools_test/test/test_subscription_callback.py

@@ -1,8 +1,9 @@
 import unittest
+
 from tracetools_test.utils import (
+    cleanup_trace,
     get_trace_event_names,
     run_and_trace,
-    cleanup_trace,
 )
 
 BASE_PATH = '/tmp'
@@ -12,6 +13,7 @@ subscription_callback_events = [
     'ros2:rclcpp_subscription_callback_end',
 ]
 
+
 class TestSubscriptionCallback(unittest.TestCase):
 
     def test_callback(self):

tracetools_test/test/test_timer.py

@@ -1,8 +1,9 @@
 import unittest
+
 from tracetools_test.utils import (
+    cleanup_trace,
     get_trace_event_names,
     run_and_trace,
-    cleanup_trace,
 )
 
 BASE_PATH = '/tmp'
@@ -14,6 +15,7 @@ timer_events = [
     'ros2:rclcpp_timer_callback_end',
 ]
 
+
 class TestTimer(unittest.TestCase):
 
     def test_all(self):