[Numpy-discussion] Proposal for changing the names of inverse trigonometrical/hyperbolic functions

Francesc Alted faltet@pytables....
Tue Nov 25 03:15:32 CST 2008

A Monday 24 November 2008, Jarrod Millman escrigué:
> On Mon, Nov 24, 2008 at 10:45 AM, Francesc Alted <faltet@pytables.org> 
> > So, IMHO, I think it would be better to rename the inverse
> > trigonometric functions from ``arc*`` to ``a*`` prefix.  Of course,
> > in order to do that correctly, one should add the new names and add
> > a
> > ``DeprecationWarning`` informing that people should start to use
> > the new names.  After two or three NumPy versions, the old function
> > names can be removed safely.
> >
> > What people think?
> +1
> It seems there is a fair amount of favor for adding the new names.
> There is some resistance to removing the old ones.  I would be happy
> to deprecate the old ones, but leave them in until we release a new
> major release (i.e., NumPy 2.0.0).  We could start creating a list of
> API/ABI clean-ups for whenever we find a compelling reason to release
> a new major version.  In the meantime, we can leave the old names in
> and just add a deprecation note to the docs.  Once we are ready to
> release 2.0, we can release a 1.x with deprecation warnings.

Sounds like a plan. +1 on this.  If there are worries about portability 
issues, I'd even let the old names in 2.0 (with the deprecation 
warning, of course), although if the 1.x series are going to live long 
time (say, at least, a year), I don't think this is going to be 

Francesc Alted

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