Why structured output matters in LangChain - Test Your Understanding

Practice - 5 Tasks

1fill in blank

easy

Complete the code to define a structured output parser in LangChain.

LangChain

from langchain.output_parsers import [1]

parser = [1]()

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AStructuredOutputParser

BSimpleOutputParser

CTextOutputParser

DJsonOutputParser

Attempts:

3 left

💡 Hint

Common Mistakes

Using a parser that only handles plain text instead of structured data.

The StructuredOutputParser is used to define clear, structured outputs in LangChain.

2fill in blank

medium

Complete the code to specify the output schema for structured output.

LangChain

from langchain.output_parsers import [1]

schema = [1](name="answer", description="The final answer")
parser = StructuredOutputParser.from_schemas([schema])

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AOutputSchema

BInputSchema

CDataSchema

DResponseSchema

Attempts:

3 left

💡 Hint

Common Mistakes

Confusing input schema with output schema.

ResponseSchema defines the structure of the output expected from the model.

3fill in blank

hard

Fix the error in the code to correctly parse the structured output.

LangChain

response = '{"answer": "42"}'
parsed = parser.[1](response)

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Aparse

Bparse_text

Cparse_json

Dparse_response

Attempts:

3 left

💡 Hint

Common Mistakes

Using methods that do not exist or are not part of the parser API.

The parse method is used to convert the raw response string into structured data.

4fill in blank

hard

Fill both blanks to create a prompt template that uses structured output parsing.

LangChain

from langchain.prompts import PromptTemplate

prompt = PromptTemplate(
    template="Answer the question: {question}",
    input_variables=[[1]],
    output_parser=[2]
)

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A"question"

B"answer"

Cparser

Dschema

Attempts:

3 left

💡 Hint

Common Mistakes

Using wrong variable names or forgetting to match input variables with template placeholders.

The input variable is "question" and the output parser is the parser instance.

5fill in blank

hard

Fill all three blanks to extract the structured output and access the answer value.

LangChain

result = parser.parse([1])
answer = result.[2]
print(f"The answer is: [3]")

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Aresponse

Banswer

Dresult

Attempts:

3 left

💡 Hint

Common Mistakes

Confusing variable names or trying to print the wrong variable.

We parse the response, access the answer attribute, and print it.