[Solved] Given this code snippet:from langchain.prompts import ChatPromptTemplate prompt = ChatPromptTemplate.from_messages([ ("system", "You are a helpful assistant.... | LangChain

LangChain - Prompt Templates

Given this code snippet:

from langchain.prompts import ChatPromptTemplate

prompt = ChatPromptTemplate.from_messages([
    ("system", "You are a helpful assistant."),
    ("user", "Hello, what is the weather today?")
])
print(prompt.format())

What will be the output?

AAn empty string

BAn error because from_messages does not exist

CA formatted string combining system and user messages

DOnly the user message printed

Step-by-Step Solution

Solution:

Step 1: Understand from_messages method
This method creates a ChatPromptTemplate from a list of message tuples with roles and content.
Step 2: Analyze prompt.format() behavior
Calling format() combines the messages into a single formatted string including both system and user messages.
Final Answer:
A formatted string combining system and user messages -> Option C
Quick Check:
from_messages + format() = combined messages [OK]

Quick Trick: from_messages builds prompt; format() outputs combined text [OK]

Common Mistakes:

Assuming from_messages is invalid
Expecting only one message output
Thinking format() returns empty string

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Given this code snippet:

Step 1: Understand from_messages method

Step 2: Analyze prompt.format() behavior

Final Answer:

Quick Check:

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