[Solved] What will happen if you try to format a prompt template without providing a required input variable?template = PromptTemplate(template="Hi {name}", input_variables=["name"]) prompt = template.format() | LangChain

LangChain - Prompt Templates

What will happen if you try to format a prompt template without providing a required input variable?

template = PromptTemplate(template="Hi {name}", input_variables=["name"])
prompt = template.format()

AIt replaces {name} with an empty string

BIt raises an error about missing 'name' variable

CIt prints 'Hi {name}' literally

DIt ignores the placeholder and prints 'Hi '

Step-by-Step Solution

Solution:

Step 1: Check required input variables
The template requires 'name' to be provided when formatting.
Step 2: Understand behavior when missing variables
Not providing 'name' causes the format method to raise an error indicating the missing variable.
Final Answer:
It raises an error about missing 'name' variable -> Option B
Quick Check:
Missing input variable causes error = C [OK]

Quick Trick: Always provide all input_variables when formatting [OK]

Common Mistakes:

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