[Solved] Given the following code, what will be the output of full_prompt.format(name="Alice")? from langchain.... Given the following code, what will be the output of full_prompt.format(name="Alice")? | LangChain

LangChain - Prompt Templates

Given the following code, what will be the output of full_prompt.format(name="Alice")?

from langchain.prompts import PartialPromptTemplate, PromptTemplate
partial = PartialPromptTemplate(template="Hello {name}", input_variables=["name"])
full_prompt = PromptTemplate(template="{greeting}, welcome!", input_variables=["greeting"])
full_prompt = full_prompt.partial(greeting=partial)

A"{greeting}, welcome!"

B"Hello Alice, welcome!"

C"Hello {name}, welcome!"

DError: missing variable 'name'

Step-by-Step Solution

Solution:

Step 1: Understand partial prompt substitution
The partial prompt replaces the greeting variable in full_prompt with the partial template.
Step 2: Format the full prompt with name="Alice"
Calling full_prompt.format(name="Alice") fills {name} in partial, producing "Hello Alice", then inserts it into full prompt, resulting in "Hello Alice, welcome!".
Final Answer:
"Hello Alice, welcome!" -> Option B
Quick Check:
Partial fills greeting, then full prompt formats [OK]

Quick Trick: Partial fills variables inside main prompt [OK]

Common Mistakes:

Expecting raw template string without substitution
Confusing variable names and placeholders
Missing that partial is nested inside full prompt

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More LangChain Quizzes

Given the following code, what will be the output of full_prompt.format(name="Alice")?

Step 1: Understand partial prompt substitution

Step 2: Format the full prompt with name="Alice"

Final Answer:

Quick Check:

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