Langchain OPEA integration Package

[yogeshmpandey]

Description

First version of the OPEA OpenAI compatible Langchain Package.

Issues

List the issue or RFC link this PR is working on. If there is no such link, please mark it as n/a.

#831
opea-project/GenAIExamples#1113

Type of change

List the type of change like below. Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds new functionality)
• Breaking change (fix or feature that would break existing design and interface)
• Others (enhancement, documentation, validation, etc.)

Dependencies

List the newly introduced 3rd party dependency if exists.

langchain-tests
langchain-chroma
python-poetry

Tests

Describe the tests that you ran to verify your changes.

Tests added in the tests dir along with test scripts.

[joshuayao]

Hi @yogeshmpandey, thanks for your contribution. Could you please check the CI failure?

[chensuyue]

GenAIComps/.pre-commit-config.yaml

Line 125 in 277351a

- repo: https://github.com/astral-sh/ruff-pre-commit

  - repo: https://github.com/astral-sh/ruff-pre-commit
    rev: v0.8.6
    hooks:
      - id: ruff
        args: [--fix, --exit-non-zero-on-fix, --no-cache]
        exclude: |
          (?x)^(
              comps/integrations/langchain/samples/qa_streaming.ipynb |
              comps/integrations/langchain/samples/summarize.ipynb
          )$

You can add this to omit https://docs.astral.sh/ruff/rules/print/

[chensuyue]

Why do you need an empty print here?

[yogeshmpandey]

This is generated from langchain boilerplate code and is present in all the langchain partner packages. Ref : Anthropic , Groq