Python的matplotlib绘图如何修改背景颜色的实现

import matplotlib.pyplot as pltimport numpy as np # Fixing random state for reproducibilitynp.random.seed(19680801) dt = 0.01t = np.arange(0, 30, dt)nse1 = np.random.randn(len(t))         # white noise 1nse2 = np.random.randn(len(t))         # white noise 2s1 = np.sin(2 * np.pi * 10 * t) + nse1s2 = np.sin(2 * np.pi * 10 * t) + nse2s3 = np.sin(2 * np.pi * 10 * t) + nse1s4 = np.sin(2 * np.pi * 10 * t) + nse2 fig= plt.figure(1) # 创建图表1axs0=plt.subplot(221,axisbg='#FFDAB9') #在图标1中创建子图axs0.plot(t, s1) #横轴与纵轴数据axs0.set_xlim(0, 2) #限制x轴的取值范围axs1=plt.subplot(222,axisbg='#7FFF00')axs1.plot(t, s2)axs1.set_xlim(0, 2)axs2=plt.subplot(223,axisbg='#FF7F50')axs2.plot(t, s3)axs2.set_xlim(0, 2)axs3=plt.subplot(224,axisbg='#A9A9A9')axs3.plot(t, s4)axs3.set_xlim(0, 2) plt.show()