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Identify the error in this Langchain document loading code:

medium📝 Debug Q6 of 15
LangChain - Document Loading
Identify the error in this Langchain document loading code: 
loader = TextLoader('data.pdf')
docs = loader.load()
ANo error; code is correct
BTextLoader cannot load PDF files; use PDFLoader instead
CFile path should be a URL, not a local path
DMissing parentheses in load method call
Step-by-Step Solution
Solution:

  1. Step 1: Check loader type vs file type

    TextLoader is for text files, not PDFs.

  2. Step 2: Identify correct loader for PDFs

    PDFLoader should be used to load PDF files.

  3. Final Answer:

    TextLoader cannot load PDF files; use PDFLoader instead -> Option B

  4. Quick Check:

    Loader must match file type [OK]
Quick Trick: Match loader type to file format to avoid errors [OK]
Common Mistakes:
  • Using TextLoader for PDFs
  • Ignoring loader-file type mismatch
  • Assuming local paths must be URLs

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