[Solved] What is the error in the following code snippet? partial = PartialPromptTemplate(template="Hi {user}", input_variables=["name"]) | LangChain

LangChain - Prompt Templates

What is the error in the following code snippet?

partial = PartialPromptTemplate(template="Hi {user}", input_variables=["name"])

AVariable name in template and input_variables do not match

BMissing import statement for PartialPromptTemplate

CTemplate string must not contain variables

Dinput_variables should be a string, not a list

Step-by-Step Solution

Solution:

Step 1: Compare template variables and input_variables list
The template uses {user} but input_variables list contains "name".
Step 2: Identify mismatch causes error
Variables must match exactly; mismatch causes runtime error when formatting.
Final Answer:
Variable name in template and input_variables do not match -> Option A
Quick Check:
Variable names must match in template and input_variables [OK]

Quick Trick: Check variable names match exactly in template and list [OK]

Common Mistakes:

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