LangChain - Evaluation and Testing
After setting up A/B testing with prompt variations, your results dictionary is empty. What is the most likely reason?
After setting up A/B testing with prompt variations, your results dictionary is empty. What is the most likely reason?
medium📝 Debug Q7 of 15
Step-by-Step Solution
Solution:
Step 1: Understand how input affects output
If the input dictionary is empty, prompt variables cannot be filled, so no meaningful output is generated.Step 2: Check other options
Calling run() is necessary, but if called with empty inputs, results can be empty. Prompt templates without variables still produce static text. Using SequentialChain affects chaining, not emptiness.Final Answer:
You passed an empty input dictionary to run() -> Option DQuick Check:
Empty input dict causes empty results [OK]
Quick Trick: Always provide input variables to get results [OK]
Common Mistakes:
MISTAKES- Forgetting to call run()
- Assuming templates without variables cause empty output
- Confusing chain types for empty results
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