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app.py

@@ -2,6 +2,8 @@ import streamlit as st
 from PIL import Image
 
 file = st.file_uploader('Upload An Image')
-with Image.open(file) as img:
-    st.write(file)
-    st.write(img.size)
+
+if file:
+    with Image.open(file) as img:
+        st.write(file)
+        st.write(img.size)