MatplotlibDeprecationWarning: Calling gca() with keyword arguments was deprecated in Matplotlib 3.4.

问题：

ax = fig.gca(projection='3d')

使用matplotlib绘制3D图像时出现警告：“MatplotlibDeprecationWarning: Calling gca() with keyword arguments was deprecated in Matplotlib 3.4. Starting two minor releases later, gca() will take no keyword arguments. The gca() function should only be used to get the current axes, or if no axes exist, create new axes with default keyword arguments. To create a new axes with non-default arguments, use plt.axes() or plt.subplot(). ax = fig.gca(projection='3d')”

解决方法：

ax = fig.add_subplot(projection='3d')

根据上述做修改即可

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MatplotlibDeprecationWarning: Calling gca() with keyword arguments was deprecated in Matplotlib 3.4.

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