[Solved] Given the following code, what will be the output of result? from langchain import PromptTemplate, LLMChain prompt1 = PromptTemplate(template="Hello {name}") prompt2 = PromptTemplate(template="How... | LangChain

LangChain - Prompt Templates

Given the following code, what will be the output of result?

from langchain import PromptTemplate, LLMChain
prompt1 = PromptTemplate(template="Hello {name}")
prompt2 = PromptTemplate(template="How are you, {name}?")
chain = LLMChain(prompt=prompt1)
output1 = chain.run(name="Alice")
chain.prompt = prompt2
result = chain.run(name="Alice")

A"Hello Alice"

B"Hello Alice" then "How are you, Alice?"

CError because prompt cannot be changed after creation

D"How are you, Alice?"

Step-by-Step Solution

Solution:

Step 1: Understand prompt assignment in LLMChain
The chain is first created with prompt1, then prompt is replaced by prompt2 before second run.
Step 2: Analyze output of second run
Since prompt2 is active at second run, output will be from prompt2: "How are you, Alice?".
Final Answer:
"How are you, Alice?" -> Option D
Quick Check:
Changing prompt before run changes output [OK]

Quick Trick: Last assigned prompt defines output in LLMChain run [OK]

Common Mistakes:

Assuming output1 and result combine
Believing prompt cannot be changed after creation
Expecting output from first prompt on second run

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More LangChain Quizzes

Given the following code, what will be the output of result?

Step 1: Understand prompt assignment in LLMChain

Step 2: Analyze output of second run

Final Answer:

Quick Check:

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