Small fixes for modern flake8. (ros2#1264)

It doesn't like to compare types with ==, so switch to
isinstance as appropriate.

Signed-off-by: Chris Lalancette <clalancette@gmail.com>
Signed-off-by: Michael Carlstrom <rmc@carlstrom.com>

rclpy/rclpy/parameter.py

@@ -319,7 +319,7 @@ def parameter_dict_from_yaml_file(
 
         for n in param_keys:
             value = param_file[n]
-            if type(value) != dict or 'ros__parameters' not in value:
+            if not isinstance(value, dict) or 'ros__parameters' not in value:
                 raise RuntimeError(f'YAML file is not a valid ROS parameter file for node {n}')
             param_dict.update(value['ros__parameters'])
         return _unpack_parameter_dict(namespace, param_dict)
@@ -337,7 +337,7 @@ def _unpack_parameter_dict(namespace, parameter_dict):
     for param_name, param_value in parameter_dict.items():
         full_param_name = namespace + param_name
         # Unroll nested parameters
-        if type(param_value) == dict:
+        if isinstance(param_value, dict):
             parameters.update(_unpack_parameter_dict(
                     namespace=full_param_name + PARAMETER_SEPARATOR_STRING,
                     parameter_dict=param_value))

rclpy/test/test_logging_rosout.py

@@ -83,7 +83,7 @@ def test_enable_rosout(
 
     if expected_data:
         assert (rosout_subscription_msg is not None)
-        assert (type(rosout_subscription_msg) == Log)
+        assert (isinstance(rosout_subscription_msg, Log))
         assert (LoggingSeverity(rosout_subscription_msg.level) == LoggingSeverity.INFO)
         assert (len(rosout_subscription_msg.msg) != 0)
         assert (rosout_subscription_msg.msg == message_data)