MatplotlibDeprecationWarning: Adding an axes using the same arguments as a previous axes currently reuses the earlier instance. In a future version, a new instance will always be created and returned. Meanwhile, this warning can be suppressed, and the future behavior ensured, by passing a unique label to each axes instance.
可以忽视，因为它说在未来的版本可能有问题，但是如果你只用但钱的版本，是没事的。
基本没有影响，但最好升级一下
fig=plt.figure() # --------------------------------------------------- 这种ax设置方式，不会报出 警告
ax=fig.add_subplot(projection='3d')