I got this error when executing the plot files on macOS Ventura 13.0.1 with Python 3.10.8 and matplotlib 3.6.1:

programming_ML/code/03_gradient:

$ python3 plot_loss_with_path.py
Traceback (most recent call last):
  File "/Users/germain/Code/lang/python/programming_ML/code/03_gradient/plot_loss_with_path.py", line 70, in <module>
    ax = plt.figure().gca(projection="3d")
TypeError: FigureBase.gca() got an unexpected keyword argument 'projection'

$ python3 plot_loss_with_slices.py
Traceback (most recent call last):
  File "/Users/germain/Code/lang/python/programming_ML/code/03_gradient/plot_loss_with_slices.py", line 70, in <module>
    ax = plt.figure().gca(projection="3d")
TypeError: FigureBase.gca() got an unexpected keyword argument 'projection'

programming_ML/code/04_hyperspace :

$ python3 plot_plane.py
Traceback (most recent call last):
  File "/Users/germain/Code/lang/python/programming_ML/code/04_hyperspace/plot_plane.py", line 17, in <module>
    ax = plt.figure().gca(projection="3d")
TypeError: FigureBase.gca() got an unexpected keyword argument 'projection'

There is a fix ?
tks˜