Langchain Module Not found issue

☁️ Streamlit Community Cloud
1

Hey @Charly_Wargnier

any possible solution for this error -ModuleNotFoundError: No module named ‘langchain.chains.question_answering’

I searched a lot but this issue is not getting resolved

1 Like
2

So this doesn’t work, even if you upgrade/downgrade to a different version of LangChain?

If not, I’ll need to dig into this.

3

How can it possibly work locally & not on deployment. Very Strange. If you want i can share the code with you, do let me know.

4

Same problem, can’t get it to work… Have a requirements.txt file - still nothing

5

Different version of langchain.

6

I did try different versions of langchain, but no luck.

7

Use the version that works locally.

8

@Goyo Doing that only, but it is still not working!

9

It works for me. You must be doing something different.

10

I am having this issue as well:

Error during deployment:

2023-08-23 07:34:11.446 Uncaught app exception
Traceback (most recent call last):
  File "/home/adminuser/venv/lib/python3.9/site-packages/streamlit/runtime/scriptrunner/script_runner.py", line 552, in _run_script
    exec(code, module.__dict__)
  File "/mount/src/job-interview-assistant/main.py", line 24, in <module>
    from st_helpers.audio_helpers import load_eleven_labs_voice
  File "/mount/src/job-interview-assistant/st_helpers/audio_helpers.py", line 23, in <module>
    from langchain.chains.conversation.memory import ConversationSummaryMemory
ModuleNotFoundError: No module named 'langchain'
2023-08-23 07:34:11.489 Uncaught app exception
Traceback (most recent call last):
  File "/home/adminuser/venv/lib/python3.9/site-packages/streamlit/runtime/scriptrunner/script_runner.py", line 552, in _run_script
    exec(code, module.__dict__)
  File "/mount/src/job-interview-assistant/main.py", line 24, in <module>
    from st_helpers.audio_helpers import load_eleven_labs_voice
  File "/mount/src/job-interview-assistant/st_helpers/audio_helpers.py", line 23, in <module>
    from langchain.chains.conversation.memory import ConversationSummaryMemory
ModuleNotFoundError: No module named 'langchain'
11

I deployed your app and could not reproduce the issue. I got an error about secrets.json not being found, but that is expected. The langchain import just works.

1 Like
12

Thanks for getting back to this @Goyo Do you think I should restart my browser and clear cookies/cache? I am unsure how to resolve this. I tried rebooting the app, and it did not change anything.

13

You made a lot of commits after my fork. Maybe try to deploy the same version as a new application.

https://diy4fvtaq7kzbthyiql8w3.streamlit.app/

Or search your logs for error messages related to the installation of langchain.

1 Like
14

Hi @Goyo, Thanks for your responses! What worked for me was clearing my browser data, clearing my browser cache, and then rebooting the app. This was using google chrome.

15

Greetings @abhijithjainn,
Try rehosting your application on streamlit cloud. Also if you have not mentioned langchain version in the requirements.txt, do that as well. The issue should not persist.