add download button

app.py

@@ -40,5 +40,14 @@ top_coexp_hits = top_coexp_hits[[
     'gene_id_1', 'gene_symbol_1', 'description_1',
     'gene_id_2', 'gene_symbol_2', 'description_2',
     'coexp_score', 'blastp_EValue']]
+top_coexp_hits.drop_index()
+
+
+st.download_button(
+    label="Download data as TSV",
+    data = top_coexp-hits.to_csv(sep ='\t').encode('utf-8'),
+    file_name= f"top_coexp_hits_{gene_id}.tsv",
+    mime="text/csv")
+
 
 st.table(top_coexp_hits)