ModuleNotFoundError: No module named 'ray.rllib.agents'

[Quaterion]

In tensor-house/supply-chain/supply-chain-reinforcement-learning.ipynb
the code

import ray.rllib.agents.ddpg as ddpg

gives the error

ModuleNotFoundError: No module named 'ray.rllib.agents'

After changing the line to

import ray.rllib.algorithms.ddpg as ddpg

there is still the problem that the config does not work

AttributeError: module 'ray.rllib.algorithms.ddpg' has no attribute 'DEFAULT_CONFIG'

I use
ray version 2.4.0
Python 3.10.9
Ubuntu

[JBOE22175]

I got the same problem with ray 2.5.1. I even tried to change further parts but got nowhere.
Ray changed a lot of modules. Obviously, the notebooks were created under an older version but it is unclear whcih version will work. The requirement.txt file does not specify any version.
I also tried with versions provided here. Unfortunately, it throws some other errors.
Could you provide version numbers for the required modules. Otherwise, using the notebooks will not work.

[ankithaldar]

Try ray version 1.13.0 . It was the last version before ray moved to algorithms from agents in rllib.

[lie12huo]

In ray-2.2.0 , how should I modify the following code：
try:
from ray.rllib.agents.agent import get_agent_class
except ImportError:
from ray.rllib.agents.registry import get_agent_class

[hiepbk]

Try ray version 1.13.0 . It was the last version before ray moved to algorithms from agents in rllib.

Thank you, It's work for me

[daniel-alex101]

Try ray version 1.13.0 . It was the last version before ray moved to algorithms from agents in rllib.

ERROR: Could not find a version that satisfies the requirement ray==1.13.0 (from versions: 2.3.0, 2.3.1, 2.4.0, 2.5.0, 2.5.1, 2.6.0, 2.6.1, 2.6.2, 2.6.3, 2.7.0rc0, 2.7.0, 2.7.1, 2.7.2, 2.8.0, 2.8.1, 2.9.0, 2.9.1, 2.9.2, 2.9.3, 2.10.0, 2.11.0, 2.12.0, 2.20.0, 2.21.0, 2.22.0, 2.23.0, 2.24.0, 2.30.0, 2.31.0, 2.32.0rc0, 2.32.0, 2.33.0, 2.34.0, 2.35.0, 2.36.0, 2.36.1, 2.37.0, 2.38.0, 2.39.0, 2.40.0, 2.41.0)
ERROR: No matching distribution found for ray==1.13.0

Help please