add pdf ext code

app.py

@@ -1,5 +1,7 @@
 import gradio as gr
 from huggingface_hub import InferenceClient
+import PyPDF2
+import io
 
 """
 For more information on `huggingface_hub` Inference API support, please check the docs: https://huggingface.co/docs/huggingface_hub/v0.22.2/en/guides/inference
@@ -40,6 +42,20 @@ def respond(
         yield response
 
 
+def extract_text_from_pdf(pdf_file):
+    if pdf_file is None:
+        return "No file uploaded."
+    
+    try:
+        pdf_reader = PyPDF2.PdfReader(io.BytesIO(pdf_file))
+        text = ""
+        for page in pdf_reader.pages:
+            text += page.extract_text() + "\n\n"
+        return text.strip()
+    except Exception as e:
+        return f"An error occurred: {str(e)}"
+
+
 """
 For information on how to customize the ChatInterface, peruse the gradio docs: https://www.gradio.app/docs/chatinterface
 """
@@ -59,6 +75,18 @@ demo = gr.ChatInterface(
     ],
 )
 
+pdf_interface = gr.Interface(
+    fn=extract_text_from_pdf,
+    inputs=gr.File(label="Upload PDF", type="binary"),
+    outputs="text",
+    title="PDF Text Extractor",
+    description="Upload a PDF file to extract its text content."
+)
+
+demo = gr.TabbedInterface(
+    [demo, pdf_interface],
+    ["Chat", "PDF Extractor"]
+)
 
 if __name__ == "__main__":
     demo.launch()