You want to create a few-shot prompt template that filters out examples with empty outputs before formatting. Which approach correctly applies this filtering in Langchain?

hard📝 Application Q15 of 15

LangChain - Prompt Templates

AFilter the examples list before passing it to FewShotPromptTemplate constructor

BUse a custom example_prompt that skips empty outputs during formatting

CSet prefix to None and rely on Langchain to ignore empty outputs

DPass all examples and filter outputs after calling prompt_template.format()

Step-by-Step Solution

Solution:

Step 1: Understand filtering in few-shot templates
FewShotPromptTemplate uses the examples list as-is; filtering must happen before passing examples.
Step 2: Evaluate options for filtering
Only filtering the examples list before creating the template ensures empty outputs are excluded properly.
Final Answer:
Filter the examples list before passing it to FewShotPromptTemplate constructor -> Option A
Quick Check:
Pre-filter examples before constructor = A [OK]

Quick Trick: Filter examples before creating the prompt template [OK]

Common Mistakes:

Trying to filter inside example_prompt formatting
Assuming Langchain auto-filters empty outputs
Filtering after formatting instead of before

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More LangChain Quizzes

You want to create a few-shot prompt template that filters out examples with empty outputs before formatting. Which approach correctly applies this filtering in Langchain?

Step 1: Understand filtering in few-shot templates

Step 2: Evaluate options for filtering

Final Answer:

Quick Check:

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