Step 5: matplotlib error

[neronotdante]

gca() with keyword arguments was deprecated in Matplotlib 3.4 usingsubplot() or add_subplot()may resolve the question

[bugleilei]

您的来信已收到，谢谢！

[unverozkol]

using "ax = fig.add_subplot(111, projection='3d')" solved the problem in my case

[onitake]

It looks like the first argument is optional in matplotlib.

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

worked for me.