在学习引力波图像绘制时出现以下提示，不知道怎么办，
MatplotlibDeprecationWarning: savefig() got unexpected keyword argument "dpi" which is no longer supported as of 3.3 and will become an error two minor releases later
fig.tight_layout()
<Figure size 432x288 with 0 Axes>
尝试将matplotlib升级到3.4.0以上（有相应补丁），参考： https://github.com/matplotlib/matplotlib/pull/19503
升级后问题解决，谢谢！