[Solved] Given this code snippet, what will print(memory.load_memory_variables({})) output? from langchain.... Given this code snippet, what will print(memory.load_memory_variables({})) output? | LangChain

LangChain - Conversational RAG

Given this code snippet, what will print(memory.load_memory_variables({})) output?

from langchain.memory import ConversationBufferMemory
memory = ConversationBufferMemory(return_messages=True)
memory.chat_memory.add_user_message('Hello')
memory.chat_memory.add_ai_message('Hi there!')

A{"history": "Human: Hello\nAI: Hi there!"}

BAn error because add_user_message is not a valid method

C{"history": []}

D{"history": ["Human: Hello", "AI: Hi there!"]}

Step-by-Step Solution

Solution:

Step 1: Understand return_messages=True effect
With return_messages enabled, load_memory_variables returns a dict with 'history' key holding a list of messages.
Step 2: Check how messages are added
add_user_message and add_ai_message add messages as strings prefixed with 'Human:' and 'AI:'.
Final Answer:
{"history": ["Human: Hello", "AI: Hi there!"]} -> Option D
Quick Check:
Return messages list format = {"history": ["Human: Hello", "AI: Hi there!"]} [OK]

Quick Trick: return_messages=True returns list of messages in history [OK]

Common Mistakes:

Expecting a single string instead of list
Thinking methods add_user_message do not exist
Assuming empty history

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Given this code snippet, what will print(memory.load_memory_variables({})) output?

Step 1: Understand return_messages=True effect

Step 2: Check how messages are added

Final Answer:

Quick Check:

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