catch error when ctrl camera

orbbec_camera/scripts/echo_extrintisics.py

@@ -1,18 +1,14 @@
-import imp
 from orbbec_camera_msgs.msg import Extrinsics
 from rclpy.node import Node
 from rclpy.qos import qos_profile_system_default
 import rclpy
 
 
-class EchoExtrinsics(Node):
+class TestNode(Node):
     def __init__(self):
-        super().__init__("echo_extrinsics")
+        super().__init__("test_node")
         self.subscription = self.create_subscription(
-            Extrinsics,
-            "/camera/extrinsics",
-            self.callback,
-            qos_profile_system_default
+            Extrinsics, "/camera/extrinsics", self.callback, qos_profile_system_default
         )
 
     def callback(self, msg: Extrinsics):
@@ -26,7 +22,11 @@ class EchoExtrinsics(Node):
 
 
 def main(args=None):
-    rclpy.init()
+    rclpy.init(args=args)
+    test_node = TestNode()
+    rclpy.spin(test_node)
+    test_node.destry_node()
+    rclpy.shutdown()
 
 
 if __name__ == "__main__":