vaex dataset cannot be read in bqplot example

[SylvainCorlay]

ERROR:MainThread:vaex.file:could not read 4 bytes from '/Users/scorlay/.vaex/data/helmi-dezeeuw-2000-10p.hdf5'
Downloading http://vaex.astro.rug.nl/data/helmi-dezeeuw-2000-10p.hdf5 to /Users/scorlay/.vaex/data/helmi-dezeeuw-2000-10p.hdf5
---------------------------------------------------------------------------
AttributeError                            Traceback (most recent call last)
<ipython-input-4-67d039f6bcd7> in <module>()
      1 ds = vaex.example()
      2 N = 2000 # for performance reasons we only do a subset
----> 3 x, y, z, vx, vy, vz, Lz, E = [ds.columns[k][:N] for k in "x y z vx vy vz Lz E".split()]

<ipython-input-4-67d039f6bcd7> in <listcomp>(.0)
      1 ds = vaex.example()
      2 N = 2000 # for performance reasons we only do a subset
----> 3 x, y, z, vx, vy, vz, Lz, E = [ds.columns[k][:N] for k in "x y z vx vy vz Lz E".split()]

AttributeError: 'NoneType' object has no attribute 'columns'

[maartenbreddels]

Thanks, which OS is this?

[SylvainCorlay]

OS X

[maartenbreddels]

Ok, vaex uses wget, which osx does not have by default, have fixed this in ipyvolume, until fixed try installing wget.