[PR] Add docstring to invoke_chain_with_fallback function [hamilton]

["Lang-Qiu (via GitHub)" <gi...@apache.org>]

Lang-Qiu opened a new pull request, #1623:
URL: https://github.com/apache/hamilton/pull/1623

   ## Problem
   The public function `invoke_chain_with_fallback` in `docs/code-comparisons/langchain_snippets/vanilla_fallbacks.py` lacked a docstring, which reduced code readability and made it harder for developers to understand its purpose and usage.
   
   ## Changes
   - Added a comprehensive docstring to the function, following Google Python style guidelines, to document its behavior, arguments, and return value.
   - The docstring explains that the function attempts to invoke a chain using `invoke_chain` and falls back to `invoke_anthropic_chain` on exceptions.
   - No functional changes were made; the function's external behavior and API remain unchanged.
   
   ## Verification
   - Code review to ensure the docstring accurately describes the function's logic.
   - Confirmed that existing tests pass without modification, as this is a documentation-only update.


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Re: [PR] Add docstring to invoke_chain_with_fallback function [hamilton]

["jernejfrank (via GitHub)" <gi...@apache.org>]

jernejfrank merged PR #1623:
URL: https://github.com/apache/hamilton/pull/1623


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