Update src/streamlit_app.py

src/streamlit_app.py

@@ -1,11 +1,12 @@
-import streamlit as st
 import streamlit_extras
 
 from streamlit_extras.pdf_viewer import *
 
-pdf_viewer(
-   "https://sawyerela.weebly.com/uploads/5/8/8/1/5881058/the_giver__giver_quartet_book_-_lois_lowry.pdf",
-)
+def example():
+    """Example usage of the PDF viewer component."""
+    pdf_viewer(
+        "https://sawyerela.weebly.com/uploads/5/8/8/1/5881058/the_giver__giver_quartet_book_-_lois_lowry.pdf",
+    )
 
 
 example()