[Solved] What is wrong with this chaining code snippet? from langchain import PromptTemplate, LLMChain prompt1 = PromptTemplate(template="{greeting}, {name}!... What is wrong with this chaining code snippet? | LangChain

LangChain - Prompt Templates

What is wrong with this chaining code snippet?

from langchain import PromptTemplate, LLMChain
prompt1 = PromptTemplate(template="{greeting}, {name}!")
chain = LLMChain(prompt=prompt1)
output = chain.run(greeting="Hi")
print(output)

AMissing 'name' variable causes runtime error

BPromptTemplate template syntax is invalid

CLLMChain requires two prompts to chain

Drun() method does not accept keyword arguments

Step-by-Step Solution

Solution:

Step 1: Check variables in template
Template requires 'greeting' and 'name' variables.
Step 2: Analyze run() call
Only 'greeting' is provided; 'name' is missing, causing error.
Final Answer:
Missing 'name' variable causes runtime error -> Option A
Quick Check:
All template variables must be passed to run() [OK]

Quick Trick: Pass all template variables to avoid errors [OK]

Common Mistakes:

Assuming partial variables are enough
Thinking template syntax is wrong
Believing run() disallows keyword args

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What is wrong with this chaining code snippet?

Step 1: Check variables in template

Step 2: Analyze run() call

Final Answer:

Quick Check:

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