Error in stellar_distributions

[xinyuewu21]

In cell In[3] of the notebook stellar_distributions, an error about the plots appears as shown below. The same error appears in cells In[6] and In[7]. Running at git hash ec1024d.

The code of In[3] is:

fd1 = FixedDistance(10*u.kpc)
d1 = fd1.distance(10000)

fd2 = FixedDistance(10*u.kpc, sigma=0.5*u.kpc)
d2 = fd2.distance(10000)

fig, axes = plt.subplots(1,2, figsize=(12,4), sharex=True)
ax1, ax2 = axes

bins = np.linspace(7, 13, 61)
ax1.hist(d1.value, bins, normed=True)
ax1.set(ylabel='prob. density [kpc$^{-1}$]',
        xlabel='distance [kpc]',
        title='$d=${}'.format(fd1.dist))
ax1.grid(ls=':')
ax2.hist(d2.value, bins, normed=True)
ax2.set(xlabel='distance [kpc]',
        title='$d=${}, $\sigma=${}'.format(fd2.dist, fd2.sigma))
ax2.grid(ls=':')
fig.tight_layout()

The error is:

---------------------------------------------------------------------------
AttributeError                            Traceback (most recent call last)
<ipython-input-3-05fa4a9355ef> in <module>
      9 
     10 bins = np.linspace(7, 13, 61)
---> 11 ax1.hist(d1.value, bins, normed=True)
     12 ax1.set(ylabel='prob. density [kpc$^{-1}$]',
     13         xlabel='distance [kpc]',

/opt/anaconda3/lib/python3.8/site-packages/matplotlib/__init__.py in inner(ax, data, *args, **kwargs)
   1445     def inner(ax, *args, data=None, **kwargs):
   1446         if data is None:
-> 1447             return func(ax, *map(sanitize_sequence, args), **kwargs)
   1448 
   1449         bound = new_sig.bind(ax, *args, **kwargs)

/opt/anaconda3/lib/python3.8/site-packages/matplotlib/axes/_axes.py in hist(self, x, bins, range, density, weights, cumulative, bottom, histtype, align, orientation, rwidth, log, color, label, stacked, **kwargs)
   6813             if patch:
   6814                 p = patch[0]
-> 6815                 p.update(kwargs)
   6816                 if lbl is not None:
   6817                     p.set_label(lbl)

/opt/anaconda3/lib/python3.8/site-packages/matplotlib/artist.py in update(self, props)
    994                     func = getattr(self, f"set_{k}", None)
    995                     if not callable(func):
--> 996                         raise AttributeError(f"{type(self).__name__!r} object "
    997                                              f"has no property {k!r}")
    998                     ret.append(func(v))

AttributeError: 'Rectangle' object has no property 'normed'