[Numpy-discussion] Removing datetime support for 1.4.x series ?

Charles R Harris charlesr.harris@gmail....
Tue Feb 2 11:20:44 CST 2010

On Tue, Feb 2, 2010 at 1:11 AM, David Cournapeau <cournape@gmail.com> wrote:

> Hi,
> This is a follow-up of the discussion about ABI-breakage in Numpy
> 1.4.0. To sum it up, it is caused by the new datetime support, and it
> seems difficult to fix without removing datetime support altogether
> for the 1.4.x series.
> Both Chuck and myself are in favor of removing the datetime altogether
> for 1.4.x as a solution. At least in my case, it is mostly justified
> by the report from David Huard that the current datetime support is
> still a bit too experimental to be useful for people who rely on
> binaries.
> Are there any objections ? I know in particular Travis was against it
> when it was suggested, but it was not known at that time that the
> datetime support would break the ABI (I would have been more strongly
> against it if I knew at that time). The alternative is to just signal
> a breakage of the ABI in NumPy 1.4.1. I would like to solve this issue
> ASAP, as it is quite a burden for people who rely on binaries
> (changing the ABI would at least generate a useful message instead of
> weird failures / crashes).
Removal would also fix the Cython problem, no? Having a release of Cython
that fixes that problem is another argument for making the change in 1.5
rather than 1.4. The pyx files will still need to be reprocessed but at
least it will be a one time deal and folks will have warning.

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