部署时报错ImportError: cannot import name 'BaseOutputParser' from 'langchain.output_parsers'

[LibreJiayi]

File "C:\Users\Administrator\AppData\Local\Programs\Python\Python311\Lib\site-packages\llama_index\output_parsers\langchain.py", line 6, in
from langchain.output_parsers import BaseOutputParser as LCOutputParser
ImportError: cannot import name 'BaseOutputParser' from 'langchain.output_parsers' (C:\Users\Administrator\AppData\Local\Programs\Python\Python311\Lib\site-packages\langchain\output_parsers_init_.py)
已经确定正常安装，但是依然无法导入

[Keldos-Li]

把 requirements.txt 中 langchain 改为 langchain<0.0.119 重新安装依赖即可。新版 langchain 修改了包结构

Originally posted by @elonzh in #314 (comment)

pip install langchain==0.0.116
pip install gradio==3.22.1

Originally posted by @sunjianan9900 in #314 (comment)