#导入库import matplotlib.pyplot as pltimport numpy as np#数据np.random.seed(1)#生成随机数种子 使生成hig值不变n = 10x = np.arange(n)hig = np.random.random(n)#绘图(柱状图)plt.bar(x,hig,facecolor = #00FF00,alpha = 0.5)#x,y必不可少for i in range(n):plt.text(x[i],hig[i],\%.2f\%hig[i],ha = center,va = ottom)#显示数字标签hig保留两位小数，水平居中（默认left），va默认bottomplt.bar(x,-hig,facecolor = #0000FF,alpha = 0.5)for i in range(n):plt.text(x[i]
