Use pandas Styler

app.py

@@ -109,21 +109,29 @@ def filter_configs(df):
 
 def concat_result_1(result_1, results):
     results = pd.read_html(io.StringIO(results))[0]
-    return (
+    df = (
         pd.concat([result_1, results.iloc[:, [0, 2]].set_index("Parameters")], axis=1)
         .reset_index()
-        .fillna("")
-        .to_html(index=False)
+    )
+    return (
+        df.style
+        .format(na_rep="")
+        .hide(axis="index")
+        .to_html()
     )
 
 
 def concat_result_2(result_2, results):
     results = pd.read_html(io.StringIO(results))[0]
-    return (
+    df = (
         pd.concat([results.iloc[:, [0, 1]].set_index("Parameters"), result_2], axis=1)
         .reset_index()
-        .fillna("")
-        .to_html(index=False)
+    )
+    return (
+        df.style
+        .format(na_rep="")
+        .hide(axis="index")
+        .to_html()
     )