Add gridlines to plot

regularization.py

@@ -202,6 +202,8 @@ class Regularization:
             handles.append(path_line)
         ax.legend(handles=handles)
 
+        ax.grid(True)
+
         buf = io.BytesIO()
         fig.savefig(buf, format="png", bbox_inches="tight", pad_inches=0)
         plt.close(fig)