%matplotlib notebook

import matplotlib.pyplot as plt
import numpy as np
from mpl_toolkits.mplot3d import Axes3D


x, y, z = list(np.random.rand(3,10))

fig = plt.figure( figsize=(8,8))
ax = fig.add_subplot(111, projection='3d')
ax.scatter(x,y,z)
ax.set_aspect("equal")

---------------------------------------------------------------------------
NotImplementedError                       Traceback (most recent call last)
<ipython-input-1-2c7b67cedd81> in <module>
     11 ax = fig.add_subplot(111, projection='3d')
     12 ax.scatter(x,y,z)
---> 13 ax.set_aspect("equal")

/hpcfs/apps/anaconda/3.7/lib/python3.7/site-packages/matplotlib/axes/_base.py in set_aspect(self, aspect, adjustable, anchor, share)
   1279         if (not cbook._str_equal(aspect, 'auto')) and self.name == '3d':
   1280             raise NotImplementedError(
-> 1281                 'It is not currently possible to manually set the aspect '
   1282                 'on 3D axes')
   1283 

NotImplementedError: It is not currently possible to manually set the aspect on 3D axes```