Update app.py

app.py

@@ -3,9 +3,28 @@ import PyPDF2
 from transformers import RagTokenizer, RagRetriever, RagSequenceForGeneration
 from sentence_transformers import SentenceTransformer
 import torch
+from tkinter import Tk, filedialog
 
-# Step 1: Ask for PDF file path
-file_path = input("Please provide the full path to the PDF file containing the chapter: ")
+# Step 1: Ask for the PDF file via file upload dialog
+def upload_file():
+    """Open a file dialog to select a PDF file."""
+    root = Tk()
+    root.withdraw()  # Hide the root window
+    file_path = filedialog.askopenfilename(
+        title="Select PDF File",
+        filetypes=[("PDF Files", "*.pdf")],
+    )
+    if not file_path:
+        raise ValueError("No file was selected. Please upload a PDF.")
+    return file_path
+
+print("Please select the PDF file containing the chapter.")
+try:
+    file_path = upload_file()
+    print(f"File selected: {file_path}")
+except Exception as e:
+    print(f"Error: {e}")
+    exit()
 
 # Step 2: Extract text from the PDF
 def extract_text_from_pdf(file_path):