fix: update lc handbook 02 #470
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…ipynb to Work with LangChain 0.3 (#452) Changes: - Import `langchain-community` as it's required for `from langchain.callbacks import get_openai_callback`. - Import `numexpr` as it's required by `LLMMathChain`. - Updated to use LCEL, rather than importing Chain classes. - Removed LangChain Hub part at end of Notebook as it was used for importingt the deprecated LLMathChain ## Problem Describe the purpose of this change. What problem is being solved and why? ## Solution Describe the approach you took. Link to any relevant bugs, issues, docs, or other resources. ## Type of Change - [ ] Bug fix (non-breaking change which fixes an issue) - [ ] New feature (non-breaking change which adds functionality) - [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected) - [ ] This change requires a documentation update - [ ] Infrastructure change (CI configs, etc) - [ ] Non-code change (docs, etc) - [ ] None of the above: (explain here) ## Test Plan Describe specific steps for validating this change.
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arjunpatel7
approved these changes
Jun 25, 2025
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Changes:
langchain-communityas it's required forfrom langchain.callbacks import get_openai_callback.numexpras it's required byLLMMathChain.Type of Change