fix file upload

app.py

@@ -19,12 +19,11 @@ if uploaded_file is not None:
     bytes_data = uploaded_file.getvalue()
     st.write(len(bytes_data), "bytes")
     saved_file_path = save_uploaded_file(uploaded_file)
-
-monkeyReader = reader.MonkeyReader('monkey')
-outline = monkeyReader.readOutline(saved_file_path)
-
-for pre, fill, node in outline:
-    st.write("%s%s" % (pre, node.name))
-
-# read paper content
-essay = monkeyReader.readEssay(saved_file_path)
+    monkeyReader = reader.MonkeyReader('monkey')
+    outline = monkeyReader.readOutline(saved_file_path)
+    
+    for pre, fill, node in outline:
+        st.write("%s%s" % (pre, node.name))
+    
+    # read paper content
+    essay = monkeyReader.readEssay(saved_file_path)