How would you combine a custom evaluation metric with a built-in metric to create a composite score in Langchain?

hard📝 Application Q9 of 15

LangChain - Evaluation and Testing

ADefine a new class that calls both metrics' evaluate methods and averages their results

BOverride the built-in metric to ignore its calculation

CUse only the custom metric and discard the built-in one

DCall the built-in metric inside the model training loop

Step-by-Step Solution

Solution:

Step 1: Understand composite metric concept
Combining metrics means calling both and merging their scores meaningfully.
Step 2: Implement a class that calls both evaluate methods and averages results
This approach returns a balanced score reflecting both metrics.
Final Answer:
Define a new class that calls both metrics' evaluate methods and averages their results -> Option A
Quick Check:
Composite metric = average of two evaluate results [OK]

Quick Trick: Combine by averaging evaluate results from both metrics [OK]

Common Mistakes:

MISTAKES

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