LangChain - Chains and LCEL
You want to create a SequentialChain that first summarizes text, then translates the summary. How should you design the chains to work correctly?
You want to create a SequentialChain that first summarizes text, then translates the summary. How should you design the chains to work correctly?
hard📝 Conceptual Q8 of 15
Step-by-Step Solution
Solution:
Step 1: Plan data flow between chains
The first chain summarizes text and outputs under a key, e.g., 'summary'.Step 2: Match output and input keys
The second chain should accept input with the same key 'summary' to translate it.Final Answer:
Make the first chain output key 'summary' and second chain input key 'summary' -> Option BQuick Check:
Matching keys enable smooth data flow [OK]
Quick Trick: Match output and input keys for smooth chain linking [OK]
Common Mistakes:
- Using same input key without output keys
- Reversing input/output roles
- Using unrelated keys causing failure
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