Update app.py

app.py

@@ -1,7 +1,11 @@
 import gradio as gr
+import PyPDF2
 
-def greet(name):
-    return "Hello " + name + "!!"
+def greet(file):
+    reader = PyPDF2.PdfReader(file.name)
+    number_of_pages = len(reader.pages)
+    return f"Uploaded {file.name} with {number_of_pages} pages"
 
-demo = gr.Interface(fn=greet, inputs="text", outputs="text")
+demo = gr.Interface(fn=greet, inputs=gr.inputs.File(file_types=[".pdf"]), outputs="text")
 demo.launch()
+