Plot the 3D surface

import matplotlib.pyplot as plt

from mpl_toolkits.mplot3d import axes3d

ax = plt.figure().add_subplot(projection="3d")
X, Y, Z = axes3d.get_test_data(0.05)

# Plot the 3D surface
ax.plot_surface(X, Y, Z, edgecolor="royalblue", lw=0.5, rstride=8, cstride=8, alpha=0.3)

# Plot projections of the contours for each dimension.  By choosing offsets
# that match the appropriate axes limits, the projected contours will sit on
# the 'walls' of the graph
ax.contourf(X, Y, Z, zdir="z", offset=-100, cmap="coolwarm")
ax.contourf(X, Y, Z, zdir="x", offset=-40, cmap="coolwarm")
ax.contourf(X, Y, Z, zdir="y", offset=40, cmap="coolwarm")

ax.set(xlim=(-40, 40), ylim=(-40, 40), zlim=(-100, 100), xlabel="X", ylabel="Y", zlabel="Z")

plt.show()