import  matplotlib.pyplot as pltimport numpy as npn = 1024X = np.random.normal(0,1,n)#是生成的数平均值是0，方差是1Y  = np.random.normal(0,1,n)T = np.arctan2(Y,X)#颜色plt.scatter(X,Y,s = 75,c = T,alpha=0.5)plt.xlim(-1.5,1.5)plt.ylim(-1.5,1.5)plt.xticks(())plt.yticks(())plt.show()