[Numpy-discussion] Behavior of .base

Travis Oliphant travis@continuum...
Sun Sep 30 22:17:09 CDT 2012


It sounds like there are no objections and this has a strong chance to fix the problems.    We will put it on the TODO list for 1.7.0 release.

-Travis




On Sep 30, 2012, at 9:30 PM, Charles R Harris wrote:

> 
> 
> On Sun, Sep 30, 2012 at 1:59 PM, Travis Oliphant <travis@continuum.io> wrote:
> Hey all,
> 
> In a github-discussion with Gael and Nathaniel, we came up with a proposal for .base that we should put before this list.    Traditionally, .base has always pointed to None for arrays that owned their own memory and to the "most immediate" array object parent for arrays that did not own their own memory.   There was a long-standing issue related to running out of stack space that this behavior created.
> 
> Recently this behavior was altered so that .base always points to "the original" object holding the memory (something exposing the buffer interface).   This created some problems for users who relied on the fact that most of the time .base pointed to an instance of an array object.
> 
> The proposal here is to change the behavior of .base for arrays that don't own their own memory so that the .base attribute of an array points to "the most original object" that is still an instance of the type of the array.      This would go into the 1.7.0 release so as to correct the issues reported.
> 
> What are reactions to this proposal?
> 
> 
> It sounds like this would solve the problem in the short term, but it is a bit of a hack in that the behaviour is more complicated than either the original or the current version. So I could see this in 1.7, but it might be preferable in the long term to work out what attributes are needed to solve Gael's problem more directly.
> 
> Chuck 
> 
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