python使用matplotlib绘制热图

import random
from matplotlib import pyplot as plt
from matplotlib import cm
from matplotlib import axes
from matplotlib.font_manager import FontProperties
font = FontProperties(fname='/Library/Fonts/Songti.ttc')
 
def draw():
 #定义热图的横纵坐标
 xLabel = ['A','B','C','D','E']
 yLabel = ['1','2','3','4','5']
 
 #准备数据阶段，利用random生成二维数据（5*5）
 data = []
 for i in range(5):
  temp = []
  for j in range(5):
   k = random.randint(0,100)
   temp.append(k)
  data.append(temp)
 
 #作图阶段
 fig = plt.figure()
 #定义画布为1*1个划分，并在第1个位置上进行作图
 ax = fig.add_subplot(111)
 #定义横纵坐标的刻度
 ax.set_yticks(range(len(yLabel)))
 ax.set_yticklabels(yLabel, fontproperties=font)
 ax.set_xticks(range(len(xLabel)))
 ax.set_xticklabels(xLabel)
 #作图并选择热图的颜色填充风格，这里选择hot
 im = ax.imshow(data, cmap=plt.cm.hot_r)
 #增加右侧的颜色刻度条
 plt.colorbar(im)
 #增加标题
 plt.title("This is a title", fontproperties=font)
 #show
 plt.show()
 
d = draw()