Despite get_array_prepare not being deprecated yet, I think it's probably OK to just go ahead and remove it, since it has even less usage than get_array_wrap and it never appeared in the main namespace.

I think it's probably OK to just go ahead and remove it, since it has even less usage than get_array_wrap and it never appeared in the main namespace.

Agreed. It was never public to begin with, and I've never seen it used anywhere.

The only change to the main namespace is get_array_wrap:

In [7]: set(oldall) - set(np.__all__)
Out[7]: {'get_array_wrap'}

It also looks like only items available in the main namespace were removed from np.lib.__all__ (except get_array_wrap):

In [12]: set(oldliball) - set(np.lib.__all__)
Out[12]: 
{'apply_along_axis',
 'apply_over_axes',
 'array_split',
 'column_stack',
 'dsplit',
 'dstack',
 'expand_dims',
 'get_array_wrap',
 'hsplit',
 'kron',
 'put_along_axis',
 'row_stack',
 'split',
 'take_along_axis',
 'tile',
 'vsplit'}

In [13]: diff = set(oldliball) - set(np.lib.__all__)

In [14]: diff.issubset(np.__all__)
Out[14]: False

In [15]: diff - set(np.__all__)
Out[15]: {'get_array_wrap'}

So I think that all the API changes are correct.

Thanks @mtsokol!