subplots官方
https://matplotlib.org/api/_as_gen/matplotlib.pyplot.subplots.htmlu
subplots(3,2)的参数解释
https://www.bilibili.com/video/av27623715?from=search&seid=757050385094035488
代表画图个数呈现3x2排列
举例
另一例子
https://blog.csdn.net/sinat_35930259/article/details/80002213
matplotlib.pyplot.figure()方法
https://blog.csdn.net/black_shuang/article/details/81299200
https://blog.csdn.net/sinat_35930259/article/details/80002213
plt.subplots()解释 //有返回值的类型
https://blog.csdn.net/qq_39622065/article/details/82909421
imshow官方用法