ModuleNotFoundError: No module named 'agents'

[jishenghuang]

print(sys.path)
['', '/home/hnyx/carla-ros-bridge/catkin_ws/devel/lib/python3/dist-packages', '/opt/ros/noetic/lib/python3/dist-packages', '/apollo/cyber', '/apollo/cyber/python', '/apollo', '/apollo/modules', '/apollo/modules/carla_bridge/carla_api/carla-0.9.14-py3.7-linux-x86_64.egg', '/carla/PythonAPI/carla/dist/carla-0.9.14-py3.7-linux-x86_64.egg', '/carla/PythonAPI/carla', '/apollo/bazel-bin', '/carla/PythonAPI/carla/agents', '/home/hnyx/anaconda3/envs/Carla_env/lib/python37.zip', '/home/hnyx/anaconda3/envs/Carla_env/lib/python3.7', '/home/hnyx/anaconda3/envs/Carla_env/lib/python3.7/lib-dynload', '/home/hnyx/.local/lib/python3.7/site-packages', '/home/hnyx/anaconda3/envs/Carla_env/lib/python3.7/site-packages']

import agents
Traceback (most recent call last):
File "", line 1, in
ModuleNotFoundError: No module named 'agents'
The system path already contains the agents package, but it cannot be imported.
May I ask how to solve this?