importmatplotlib.pyplotaspltimportnumpyasnp# Fixing random state for reproducibilitynp.random.seed(19680801)fig=plt.figure()ax=fig.add_subplot(projection='3d')colors=['r','g','b','y']yticks=[3,2,1,0]forc,kinzip(colors,yticks):# Generate the random data for the y=k 'layer'.xs=np.arange(20)ys=np.random.rand(20)# You can provide either a single color or an array with the same length as# xs and ys. To demonstrate this, we color the first bar of each set cyan.cs=[c]*len(xs)cs[0]='c'# Plot the bar graph given by xs and ys on the plane y=k with 80% opacity.ax.bar(xs,ys,zs=k,zdir='y',color=cs,alpha=0.8)ax.set_xlabel('X')ax.set_ylabel('Y')ax.set_zlabel('Z')# On the y-axis let's only label the discrete values that we have data for.ax.set_yticks(yticks)plt.show()

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