cannot import name 'AsyncCallbackManager' from 'langchain.callbacks.base' (/Users/friahi/Library/Python/3.9/lib/python/site-packages/langchain/callbacks/base.py)

[friahi65]

the versions in the requirement files were not locked, so the AsyncCallbackManager no longer exists in the langchain/callbacks/base.py.

[dahaoGPT]

could u tell me which version I need?

[friahi65]

I don't know either, it has to go through langchain and see which version had that AsyncCallbackManager or update the code to the newest version of langchain

[completelyboofyblitzed]

'AsyncCallbackManager' can be imported from 'langchain.callbacks.manager' now instead. At least worked for me.

[SilverNine]

'AsyncCallbackManager' can be imported from 'langchain.callbacks.manager' now instead. At least worked for me.

I'm getting this error, is there any further solution?
ERROR:root:maximum recursion depth exceeded

[HKAB]

I managed to run the project (langchain==0.0.154) with the following changes:

• from langchain.callbacks.manager import AsyncCallbackManager
• ERROR:root:maximum recursion depth exceeded: Using shallow copy instead of deep copy (copy.deepcopy ->copy.copy) in manager.py#L719. It's a problem copying websocket in StreamingLLMCallbackHandler and QuestionGenCallbackHandler. I think there are other ways that doesn't require to change langchain code, just make sure deepcopy work.
• Using ConversationalRetrievalChain instead of ChatVectorDBChain like this pull request

[completelyboofyblitzed]

@HKAB did you use solutions for ERROR:root:ChatVectorDBChain does not support async from the pull request as well?

[HKAB]

@HKAB did you use solutions for ERROR:root:ChatVectorDBChain does not support async from the pull request as well?

Yes, I edited my answer.

[dahaoGPT]

I managed to run the project (langchain==0.0.154) with the following changes:

• from langchain.callbacks.manager import AsyncCallbackManager
• ERROR:root:maximum recursion depth exceeded: Using shallow copy instead of deep copy (copy.deepcopy ->copy.copy) in manager.py#L719. It's a problem copying websocket in StreamingLLMCallbackHandler and QuestionGenCallbackHandler. I think there are other ways that doesn't require to change langchain code, just make sure deepcopy work.
• Using ConversationalRetrievalChain instead of ChatVectorDBChain like this pull request

hi , i follow your second step and modify the source code ,but it does not work ,i still get the error'ERROR:root:maximum recursion depth exceeded', so what i can do more?

i modify another (deepcopy->copy), it works now ,thx u.

[SilverNine]

'AsyncCallbackManager' can be imported from 'langchain.callbacks.manager' now instead. At least worked for me.

I'm getting this error, is there any further solution? ERROR:root:maximum recursion depth exceeded

Resolved after updating to langchain==0.0.156.

[xuanlinh91]

Still have this problem with langchain=0.0.188

[r0mdau]

I opened a PR to solve this issue #91

[ZhangYi1212]

langchain==0.0.150 solved the problem