Update app.py

app.py

@@ -102,9 +102,11 @@ def conv_txt(extype):
 # else:
 #     st.sidebar.text("Please upload a file first to enable the download button.")
 
+
 uploaded_file = st.file_uploader("Choose a file", type=['csv'])
 st.sidebar.header("Download Results")
 st.sidebar.text("Download the tagged results as a CSV file.")
+
 if uploaded_file is not None:
     df = pd.read_csv(uploaded_file, encoding='latin-1')
     st.dataframe(df)
@@ -113,11 +115,14 @@ if uploaded_file is not None:
     df['category'] = df['Abstract'].apply(lambda x: predict_category(x)[0])
     st.dataframe(df)
     
-    csv = df.to_csv(index=False, encoding='utf-8-sig')  # Using utf-8-sig to handle possible BOM issues
-    b64 = base64.b64encode(csv.encode('utf-8-sig'))
+    # Convert DataFrame to CSV and encode it properly
+    csv = df.to_csv(index=False).encode('utf-8')
+    b64 = base64.b64encode(csv).decode()  # Decode the Base64 encoded bytes
+
     st.sidebar.download_button(
-        label="Download", 
-        data=b64,
+        label="Download CSV",
+        data=base64.b64decode(b64),  # Decode Base64 to bytes
         file_name="results.csv",
-        mime="text/csv"
+        mime="text/csv",
+        key='download-csv'
     )