更新过langchain还是提示langchain.chat_models找不到

[TypicalSpider]

lee@VM-0-3-ubuntu:~/gptDemo01/ChuanhuChatGPT$ pip3 install langchain --upgrade
Defaulting to user installation because normal site-packages is not writeable
Requirement already satisfied: langchain in /home/lee/.local/lib/python3.8/site-packages (0.0.27)
Requirement already satisfied: pyyaml in /home/lee/.local/lib/python3.8/site-packages (from langchain) (6.0)
Requirement already satisfied: sqlalchemy in /home/lee/.local/lib/python3.8/site-packages (from langchain) (2.0.7)
Requirement already satisfied: pydantic in /home/lee/.local/lib/python3.8/site-packages (from langchain) (1.10.7)
Requirement already satisfied: requests in /home/lee/.local/lib/python3.8/site-packages (from langchain) (2.28.2)
Requirement already satisfied: numpy in /home/lee/.local/lib/python3.8/site-packages (from langchain) (1.24.2)
Requirement already satisfied: typing-extensions>=4.2.0 in /home/lee/.local/lib/python3.8/site-packages (from pydantic->langchain) (4.5.0)
Requirement already satisfied: idna<4,>=2.5 in /home/lee/.local/lib/python3.8/site-packages (from requests->langchain) (3.4)
Requirement already satisfied: charset-normalizer<4,>=2 in /home/lee/.local/lib/python3.8/site-packages (from requests->langchain) (3.1.0)
Requirement already satisfied: certifi>=2017.4.17 in /home/lee/.local/lib/python3.8/site-packages (from requests->langchain) (2022.12.7)
Requirement already satisfied: urllib3<1.27,>=1.21.1 in /home/lee/.local/lib/python3.8/site-packages (from requests->langchain) (1.26.15)
Requirement already satisfied: greenlet!=0.4.17 in /home/lee/.local/lib/python3.8/site-packages (from sqlalchemy->langchain) (2.0.2)
lee@VM-0-3-ubuntu:~/gptDemo01/ChuanhuChatGPT$ python3 ChuanhuChatbot.py 
Traceback (most recent call last):
  File "ChuanhuChatbot.py", line 10, in <module>
    from modules.overwrites import *
  File "/home/lee/gptDemo01/ChuanhuChatGPT/modules/overwrites.py", line 4, in <module>
    from llama_index import Prompt
  File "/home/lee/.local/lib/python3.8/site-packages/llama_index/__init__.py", line 18, in <module>
    from llama_index.indices.common.struct_store.base import SQLDocumentContextBuilder
  File "/home/lee/.local/lib/python3.8/site-packages/llama_index/indices/__init__.py", line 4, in <module>
    from llama_index.indices.keyword_table.base import GPTKeywordTableIndex
  File "/home/lee/.local/lib/python3.8/site-packages/llama_index/indices/keyword_table/__init__.py", line 4, in <module>
    from llama_index.indices.keyword_table.base import GPTKeywordTableIndex
  File "/home/lee/.local/lib/python3.8/site-packages/llama_index/indices/keyword_table/base.py", line 16, in <module>
    from llama_index.indices.base import DOCUMENTS_INPUT, BaseGPTIndex
  File "/home/lee/.local/lib/python3.8/site-packages/llama_index/indices/base.py", line 23, in <module>
    from llama_index.indices.prompt_helper import PromptHelper
  File "/home/lee/.local/lib/python3.8/site-packages/llama_index/indices/prompt_helper.py", line 12, in <module>
    from llama_index.langchain_helpers.chain_wrapper import LLMPredictor
  File "/home/lee/.local/lib/python3.8/site-packages/llama_index/langchain_helpers/chain_wrapper.py", line 6, in <module>
    from llama_index.llm_predictor.base import (  # noqa: F401
  File "/home/lee/.local/lib/python3.8/site-packages/llama_index/llm_predictor/__init__.py", line 4, in <module>
    from llama_index.llm_predictor.base import LLMPredictor
  File "/home/lee/.local/lib/python3.8/site-packages/llama_index/llm_predictor/base.py", line 10, in <module>
    from langchain.chat_models import ChatOpenAI
ModuleNotFoundError: No module named 'langchain.chat_models'

[luoye2333]

这个我也遇到了，需要用3.8以上版本的python。报错是因为langchain在python3.8能装的版本太老https://www.piwheels.org/project/langchain/
所以用python3.9就行

[TypicalSpider]

是的，好像是这样，3.8.0还不行，需要3.8.1或者更高（捂脸）
ununtu18默认的是3.6，我给升到了3.7.0不行，又升到3.8.0还不行，好像3.8.1就可以了。
README里面没写版本问题，被坑惨了哈哈

[Keldos-Li]

感谢排查，我这就去常见问题里写🥹

[MiracleSia]

same problem when upgrade openai lib version=0.28,
so pip install openai==0.27.8