Traceback (most recent call last): File "/home/melodic/catkin_ws/src/rosserial/rosserial_python/nodes/serial_node.py", line 39, in from rosserial_python import SerialClient, RosSerialServer File "/home/melodic/catkin_ws/devel/lib/python2.7/dist-packages/rosserial_python/init.py", line 34, in exec(__fh.read()) File "", line 1, in File "/home/melodic/catkin_ws/src/rosserial/rosserial_python/src/rosserial_python/SerialClient.py", line 41, in import queue ImportError: No module named queue
包导入不对，queue，你看看是不是取了重名的变量
queue是python3才有内置的吧，你这用的python2的肯定不行，最好换成python3