How to set different line colors and line style using setp method
example code:
x_1 = np.arange(10)
y_1 = np.random.randn(10)
y_2 = np.random.randn(10)
y_3 = np.random.randn(10)
lines = plt.plot(x_1,y_1, x_1,y_2, x_1,y_3)
plt.setp(lines, color='g', linewidth=2, linestyle='--')