本质上是3d版本：使用matplotlib同时绘制两个直方图
尽管由于使用Axes 3d，所以我不知道该怎么做。
from mpl_toolkits.mplot3d import Axes3D
import matplotlib.pyplot as plt
import numpy as np
kets = ["|00>","|01>","|10>","|11>"] #my axis labels
fig = plt.figure()
ax1 = fig.add_subplot(111,projection = '3d')
xpos = [0,0,0,0,1,1,1,1,2,2,2,2,3,3,3,3]
xpos = [i+0.25 for i in xpos]
ypos = [0,1,2,3,0,1,2,3,0,1,2,3,0,1,2,3]
ypos = [i+0.25 for i in ypos]
zpos = [0]*16
dx = 0.5*np.ones(16)
dy = 0.5*np.ones(16)
dz = [1,0,0,0,0,1,0,0,0,0,0,1,0,0,1,0]
dz2 = [0.2*i for i in dz] # to superimpose dz
ticksx = np.arange(0.5,4,1)
ticksy = np.arange(0.6,4,1)
ax1.bar3d(xpos, …