[Solved] What will happen if you call template.format(user="Anna") on this template?template = PromptTemplate(template="Hi {user}, your balance is {balance}.", input_variables=["user", "balance"]) | LangChain

LangChain - Prompt Templates

What will happen if you call template.format(user="Anna") on this template?

template = PromptTemplate(template="Hi {user}, your balance is {balance}.", input_variables=["user", "balance"])

AIt outputs: "Hi Anna, your balance is {balance}."

BIt outputs: "Hi Anna, your balance is None."

CIt raises an error because 'balance' variable is missing.

DIt ignores the missing variable and outputs "Hi Anna."

Step-by-Step Solution

Solution:

Step 1: Check required variables in input_variables
The template requires both 'user' and 'balance' variables to be provided.
Step 2: Understand behavior when a variable is missing
Calling format() without all required variables raises a KeyError or similar error.
Final Answer:
It raises an error because 'balance' variable is missing. -> Option C
Quick Check:
Missing variables cause errors in format() [OK]

Quick Trick: Always provide all variables listed in input_variables [OK]

Common Mistakes:

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