Update app.py

app.py

@@ -150,10 +150,10 @@ else:
             fig = px.bar(data, x="X", y=y_names_list, barmode='stack' if stacked_bars else 'group')
         fig.update_traces(hovertemplate=hovertemplate)
         if use_multiple_colors:
-            for i in range(len(data)):
-                fig.data[i].marker.color = colors[i % len(colors)]
-                fig.data[i].marker.line.color = border_colors[i % len(border_colors)]
-                fig.data[i].marker.line.width = border_width
+            for i, trace in enumerate(fig.data):
+                trace.marker.color = colors[i % len(colors)]
+                trace.marker.line.color = border_colors[i % len(border_colors)]
+                trace.marker.line.width = border_width
         else:
             fig.update_traces(marker_color=color, marker_line_color=border_color, marker_line_width=border_width)
         fig.update_layout(bargap=0.2)
@@ -216,4 +216,4 @@ else:
 
 # Información adicional
 st.write("""
-""")
+""")