Error when importing FAISSDocumentStore

[MuatazMohammed]

Describe the bug
from haystack.document_stores import FAISSDocumentStore

Error message
AttributeError: module 'faiss' has no attribute 'swigfaiss'

Expected behavior
A clear and concise description of what you expected to happen.

Additional context
Add any other context about the problem here, like document types / preprocessing steps / settings of reader etc.

To Reproduce
Steps to reproduce the behavior

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System:

• OS: Colab
• GPU/CPU: GPU
• Haystack version (commit or version number): latest version
• DocumentStore: FAISSDocumentStore
• Reader:
• Retriever:

[anakin87]

Same error of #3561 (comment).

[mgoin]

@anakin87 I also started seeing this error in our CI for deepsparse. Specifically it seems faiss-cpu==1.7.3 causes this issue. If I manually downgrade to faiss-cpu==1.7.2 there is no issue.

[MuatazMohammed]

it was solved automatically without any modifications, don't know how :D ?

[OMGAmici]

Hey everyone, I am having the same issue now. For me, I tried installing and reinstalling haystack, but it is persistent. Specifically, it appears whenever I try to import certain (but not all) packages. For example, from haystack.nodes import PreProcessor causes the error.

Besides downgrading to faiss-cpu==1.7.2, is there any other or better solution I should follow?

[maxjeblick]

I resolved this issue by uninstalling faiss-cpu, only keeping faiss-gpu.
Both versions got installed when running pip install -e '.[all-gpu]'