Fix ROS 2 node initialization by removing invalid context manager usage

source/Tutorials/Intermediate/Tf2/Writing-A-Tf2-Static-Broadcaster-Py.rst

@@ -166,26 +166,28 @@ Now open the file called ``static_turtle_tf2_broadcaster.py`` using your preferr
 
 
     def main():
+        logger = rclpy.logging.get_logger('logger')
+
+        # obtain parameters from command line arguments
+        if len(sys.argv) != 8:
+            logger.info('Invalid number of parameters. Usage: \n'
+                        '$ ros2 run learning_tf2_py static_turtle_tf2_broadcaster'
+                        'child_frame_name x y z roll pitch yaw')
+            sys.exit(1)
+
+        if sys.argv[1] == 'world':
+            logger.info('Your static turtle name cannot be "world"')
+            sys.exit(2)
+
+        # pass parameters and initialize node
         try:
-            logger = rclpy.logging.get_logger('logger')
-
-            # obtain parameters from command line arguments
-            if len(sys.argv) != 8:
-                logger.info('Invalid number of parameters. Usage: \n'
-                            '$ ros2 run learning_tf2_py static_turtle_tf2_broadcaster'
-                            'child_frame_name x y z roll pitch yaw')
-                sys.exit(1)
-
-            if sys.argv[1] == 'world':
-                logger.info('Your static turtle name cannot be "world"')
-                sys.exit(2)
-
-            # pass parameters and initialize node
-            with rclpy.init():
-                node = StaticFramePublisher(sys.argv)
-                rclpy.spin(node)
+            rclpy.init()
+            node = StaticFramePublisher(sys.argv)
+            rclpy.spin(node)
         except (KeyboardInterrupt, ExternalShutdownException):
             pass
+        finally:
+            rclpy.shutdown()
 
 2.1 Examine the code
 ~~~~~~~~~~~~~~~~~~~~