Update app.py

app.py

@@ -45,8 +45,8 @@ tab1, tab2, tab3 = st.tabs(["📈 Load Data", "📃 Tagged ETDs", "📓 Download
 with tab1:
 #===load data===
     if uploaded_file is not None:
-df = pd.read_csv(uploaded_file, encoding='latin-1')
-st.dataframe(df)
+    df = pd.read_csv(uploaded_file, encoding='latin-1')
+    st.dataframe(df)
        
 
 with tab2:
@@ -66,7 +66,7 @@ with tab3:
 #===download result===
 # Create a download button
     if st.sidebar.button("Download"):
-csv = df.to_csv(index=False)
-b64 = base64.b64encode(csv.encode()).decode()
-href = f'<a href="data:file/csv;base64,{b64}" download="results.csv">Download csv file</a>'
-st.markdown(href, unsafe_allow_html=True)
+    csv = df.to_csv(index=False)
+    b64 = base64.b64encode(csv.encode()).decode()
+    href = f'<a href="data:file/csv;base64,{b64}" download="results.csv">Download csv file</a>'
+    st.markdown(href, unsafe_allow_html=True)