fix: Make pypdf lazy import and use requirements.txt in Colab Step 1

ControlAI_Colab_Demo.ipynb

@@ -28,10 +28,11 @@
    "metadata": {},
    "outputs": [],
    "source": [
+    "# Clone repo & install all required dependencies\n",
     "!git clone https://github.com/atakankahya/controlai-agent.git\n",
     "%cd controlai-agent\n",
-    "\n",
-    "!pip install -q torch transformers accelerate scipy control cvxpy rich rank-bm25 matplotlib"
+    "!pip install -q -r requirements.txt pypdf\n",
+    "print(\"Dependencies installed successfully!\")"
    ]
   },
   {

controlai_rag/document_loader.py

@@ -6,9 +6,6 @@ import json
 from pathlib import Path
 from typing import Any
 
-from pypdf import PdfReader
-
-
 class Document:
     def __init__(self, content: str, source_path: str, metadata: dict[str, Any] | None = None) -> None:
         self.content = content
@@ -26,6 +23,7 @@ class Document:
 def load_pdf(path: Path) -> list[Document]:
     docs = []
     try:
+        from pypdf import PdfReader
         reader = PdfReader(str(path))
         for idx, page in enumerate(reader.pages, 1):
             text = page.extract_text() or ""