python话散列点

import matplotlib.pyplot as plt

X=df.loc[0:100,[0,2]].values
plt.scatter(X[:50,0],X[:50,1],color='red', marker='o',label='setosa')
plt.scatter(X[50:100,0],X[50:100,1],color='blue',marker='x',label='versicolor')
plt.xlabel('花瓣的长度')
plt.ylabel('花径的长度')
plt.legend(loc='upper left')
plt.show()