feat: Add legend for topics in vis

app.py

@@ -59,13 +59,15 @@ def draw_interactive_scatter_plot(
         Palette = AuxPallete
     p = figure(plot_width=800, plot_height=800, tools=[hover], title='2D visualization of tweets', background_fill_color="#fafafa")
     colors = factor_cmap("label", palette=[Pallete[n_colors][int(id_) + 1] for id_ in values_set], factors=values_set)
-    p.circle("x", "y", size=12, source=source, fill_alpha=0.4, line_color=colors, fill_color=colors)
+    p.circle("x", "y", size=12, source=source, fill_alpha=0.4, line_color=colors, fill_color=colors, legend_group="label")
     p.axis.visible = False
     p.xgrid.grid_line_dash = "dashed"
     p.ygrid.grid_line_dash = "dashed"
     # p.xgrid.grid_line_color = None
     # p.ygrid.grid_line_color = None
     p.toolbar.logo = None
+    p.legend.location = "top_left"
+    p.legend.title = "Topics ID"
     
     disclaimer = Label(x=0, y=0, x_units="screen", y_units="screen",
                    text_font_size="14px", text_color="gray",