matplotlib最简单的带图例线图

不废话直接上代码

import numpy as np
import matplotlib.pyplot as plt
x = [1, 2, 3, 4, 5]
y1 = [1, 4, 9, 2, 3]
y2 = [5, 2, 7, 4, 3]
plt.plot(x, y1, 'r-*', label='line1')
plt.plot(x, y2, 'b-o', label='line2')
plt.legend()
plt.show()