python绘制散点图并标记序号的方法

import numpy as npimport matplotlib.pyplot as pltx=[2.3,4.5,3,7,6.5,4,5.3]y=[5,4,7,5,5.3,5.5,6.2]n=np.arange(7)fig,ax=plt.subplots()ax.scatter(x,y,c='r')for i,txt in enumerate(n): ax.annotate(txt,(x[i],y[i]))