# Adapter from http://matplotlib.org/2.0.2/examples/mplot3d/bars3d_demo.htmlfrommpl_toolkits.mplot3dimportAxes3Dimportmatplotlib.pyplotaspltimportnumpyasnpfig=plt.figure()ax=fig.add_subplot(111,projection='3d')forc,zinzip(['r','g','b','y'], [30,20,10,0]):xs=np.arange(20)ys=np.random.rand(20)# You can provide either a single color or an array. To demonstrate this,# the first bar of each set will be colored cyan.cs= [c]*len(xs)cs[0]='c'ax.bar(xs,ys,zs=z,zdir='y',color=cs,alpha=0.8)ax.set_xlabel('X')ax.set_ylabel('Y')ax.set_zlabel('Z')# Set zlim3dax.set_zlim3d(bottom=0.2,top=1)plt.show()