refactor: Update `RecursiveCharacterTextSplitter` import to use `langchain_text_splitters` with a fallback to `langchain.text_splitter`.

requirements.txt

@@ -9,6 +9,7 @@ sentence-transformers>=2.2.2
 chromadb>=0.4.22
 langchain>=0.1.0
 langchain-community>=0.0.20
+langchain-text-splitters>=0.0.1
 
 # PDF Processing
 PyPDF2>=3.0.0

utils/pdf_processor.py

@@ -5,7 +5,10 @@ import os
 from typing import List, Dict
 import PyPDF2
 import pdfplumber
-from langchain.text_splitter import RecursiveCharacterTextSplitter
+try:
+    from langchain_text_splitters import RecursiveCharacterTextSplitter
+except ImportError:
+    from langchain.text_splitter import RecursiveCharacterTextSplitter
 from config.model_config import config
 
 class PDFProcessor: