Solution:Step 1: Check documents argument typefrom_documents expects a list of document strings, not a filename string.Step 2: Identify error causePassing "doc.txt" as a string causes an error because it is not a list of documents.Final Answer:The documents argument should be a list, not a filename

[Solved] You wrote this code:rag_chain = LCEL.RAGChain.from_documents("doc.txt", llm) answer = rag_chain.run("Explain the content.")But it raises an error. What is the likely problem? | LangChain

LangChain - RAG Chain Construction

You wrote this code:

rag_chain = LCEL.RAGChain.from_documents("doc.txt", llm)
answer = rag_chain.run("Explain the content.")

But it raises an error. What is the likely problem?

AThe llm variable is not defined

BLCEL.RAGChain does not have from_documents method

CThe run method requires two arguments

DThe documents argument should be a list, not a filename string

Step-by-Step Solution

Solution:

Step 1: Check documents argument type
from_documents expects a list of document strings, not a filename string.
Step 2: Identify error cause
Passing "doc.txt" as a string causes an error because it is not a list of documents.
Final Answer:
The documents argument should be a list, not a filename string -> Option D
Quick Check:
Documents must be list, not filename string [OK]

Quick Trick: Pass list of docs, not filename string [OK]

Common Mistakes:

Passing filename instead of document list
Assuming run needs two arguments
Thinking from_documents method is missing

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You wrote this code:

Step 1: Check documents argument type

Step 2: Identify error cause

Final Answer:

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