8))
ax = fig.add_subplot(111)
# 绘制折线图
ax.plot(x, y, marker='o', color=color1)
# 标注最大值
ax.text(x[y.idxmax...arrowprops=dict(arrowstyle='->', color=color1), fontsize=15)
ax.annotate('打折促销', xy=(x[y.idxmax...()], y.max()), color=color1,
xytext=(x[y.idxmax()]+timedelta(days=-5), y.max()+2),