[Solved] What is wrong with this LangChain code snippet? from langchain import PromptTemplate, LLMChain from langchain.... What is wrong with this LangChain code snippet? | LangChain

LangChain - Fundamentals

What is wrong with this LangChain code snippet?

from langchain import PromptTemplate, LLMChain
from langchain.llms import OpenAI

prompt = PromptTemplate(template="Hello {name}!")
llm = OpenAI(temperature=0)
chain = LLMChain(llm=llm, prompt=prompt)

result = chain.run(person="Bob")
print(result)

AThe placeholder name in the prompt does not match the argument name in run()

BOpenAI class cannot be instantiated with temperature=0

CPromptTemplate requires a 'variables' argument

DLLMChain requires a 'memory' argument

Step-by-Step Solution

Solution:

Step 1: Check placeholder and run() argument names
The prompt expects 'name' but run() is called with 'person', causing a missing variable error.
Step 2: Verify other code parts
Temperature=0 is valid, 'variables' is optional, and 'memory' is not required.
Final Answer:
The placeholder name in the prompt does not match the argument name in run() -> Option A
Quick Check:
Placeholder and argument names must match = A [OK]

Quick Trick: Match placeholder names exactly with run() arguments [OK]

Common Mistakes:

Assuming temperature=0 is invalid
Thinking 'variables' argument is mandatory
Believing 'memory' is required for LLMChain

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What is wrong with this LangChain code snippet?

Step 1: Check placeholder and run() argument names

Step 2: Verify other code parts

Final Answer:

Quick Check:

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