legend = sp.legend(loc='upper center', bbox_to_anchor=(0.885, 0.95), fontsize='8', shadow=False, ncol=2, columnspacing=0.4, borderaxespad=0.3, handletextpad=0.1, handlelength=1.7)
frame = legend.get_frame()
frame.set_linewidth(0.5)
frame.dashes=None
frame.set_alpha(1.0)
frame.set_facecolor((1.0, 1.0, 1.0, 0.75))
frame.set_edgecolor('k')