python通过文本在一个图中画多条线

import matplotlib.pyplot as plt
import numpy as np
 
data1 = np.loadtxt('/data_1/SSD/caffe/tools/extra/DSOD300_VOC0712_DSOD300_300x300.log.test')
data2 = np.loadtxt('/data_1/SSD/caffe/tools/extra/DSOD300_VOC0712_DSOD300_300x300.log.train')

plt.title('Result Analysis')

plt.plot(data1[:,0], data1[:,2],  color='skyblue', label='y1')
plt.plot(data2[:,0], data2[:,3], color='blue', label='y2')
plt.legend()
 
plt.xlabel('x')
plt.ylabel('y')
plt.show()

结果：