ImportError: cannot import name 'AsyncCallbackManager' from 'langchain.callbacks.base' (/usr/local/Python-3.11.3/lib/python3.11/site-packages/langchain/callbacks/base.py)

[dahaoGPT]

when i run ‘make start’ command ，i meet the error ‘ImportError: cannot import name 'AsyncCallbackManager' from 'langchain.callbacks.base' (/usr/local/Python-3.11.3/lib/python3.11/site-packages/langchain/callbacks/base.py)’ ，
i have already install the langchain and make the path correct
is that 'AsyncCallbackManager' has removed or what can i do to sovle the problem ?thx for help

[dahaoGPT]

I solved this problem to install version 0.0.142，here is command "pip install langchain==0.0.142"

[HKAB]

Try from langchain.callbacks.manager import AsyncCallbackManager

[dahaoGPT]

Try from langchain.callbacks.manager import AsyncCallbackManager

nice job，i use this solve the problem and update to the latest version 0.0.155，but meet another problem
File "/usr/local/chat-langchain/chat-langchain/query_data.py", line 52, in get_chain
qa = ConversationalRetrievalChain(
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/local/Python-3.11.3/lib/python3.11/site-packages/pydantic/main.py", line 341, in init
raise validation_error
pydantic.error_wrappers.ValidationError: 2 validation errors for ConversationalRetrievalChain
retriever
field required (type=value_error.missing)
vectorstore
extra fields not permitted (type=value_error.extra)

[dahaoGPT]

Try from langchain.callbacks.manager import AsyncCallbackManager

nice job，i use this solve the problem and update to the latest version 0.0.155，but meet another problem File "/usr/local/chat-langchain/chat-langchain/query_data.py", line 52, in get_chain qa = ConversationalRetrievalChain( ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/usr/local/Python-3.11.3/lib/python3.11/site-packages/pydantic/main.py", line 341, in init raise validation_error pydantic.error_wrappers.ValidationError: 2 validation errors for ConversationalRetrievalChain retriever field required (type=value_error.missing) vectorstore extra fields not permitted (type=value_error.extra)

i didn't follow all the operation on the pull request , when i add the extra fields to the 'ConversationalRetrievalChain' ,it runs .

[dahaoGPT]

the same issue as 69 ,so i close it ,we are create the issue at the same time.

[amoseev]

Please accept fix
#73

[tianyalangzi]

Try from langchain.callbacks.manager import AsyncCallbackManager 尝试 from langchain.callbacks.manager import AsyncCallbackManager

nice job，i use this solve the problem and update to the latest version 0.0.155，but meet another problem File "/usr/local/chat-langchain/chat-langchain/query_data.py", line 52, in get_chain qa = ConversationalRetrievalChain( ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/usr/local/Python-3.11.3/lib/python3.11/site-packages/pydantic/main.py", line 341, in init raise validation_error pydantic.error_wrappers.ValidationError: 2 validation errors for ConversationalRetrievalChain retriever field required (type=value_error.missing) vectorstore extra fields not permitted (type=value_error.extra)干得好，我使用它解决问题并更新到最新版本 0.0.155，但遇到另一个问题 文件“/usr/local/chat-langchain/chat-langchain/query_data.py”，第 52 行，get_chain qa = ConversationalRetrievalChain（ ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ 文件 “/usr/local/Python-3.11.3/lib/python3.11/site-packages/pydantic/main.py”，第 341 行，在 init raise validation_error pydantic.error_wrappers。验证错误：会话检索链检索器字段需要 2 个验证错误（类型=value_error.缺失） 不允许向量存储额外字段（type=value_error.extra）

i didn't follow all the operation on the pull request , when i add the extra fields to the 'ConversationalRetrievalChain' ,it runs .我没有遵循拉取请求的所有操作，当我将额外的字段添加到“对话检索链”时，它会运行。

@dahaoGPT I have the same error.
qa = ConversationalRetrievalChain(
vectorstore = vectorstore.as_retriever().
combine_docs_chain=doc_chain.
question_generator=question_generator.
callback_manager=manager
) After adding any additional fields, can you let us know? Thanks!

[sgch1982]

Try from langchain.callbacks.manager import AsyncCallbackManager

nice job，i use this solve the problem and update to the latest version 0.0.155，but meet another problem File "/usr/local/chat-langchain/chat-langchain/query_data.py", line 52, in get_chain qa = ConversationalRetrievalChain( ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/usr/local/Python-3.11.3/lib/python3.11/site-packages/pydantic/main.py", line 341, in init raise validation_error pydantic.error_wrappers.ValidationError: 2 validation errors for ConversationalRetrievalChain retriever field required (type=value_error.missing) vectorstore extra fields not permitted (type=value_error.extra)

i didn't follow all the operation on the pull request , when i add the extra fields to the 'ConversationalRetrievalChain' ,it runs .

good