Grib Py3 whats new

[marqh]

replacing #1774 for now, noting the lack of support for GRIB in Python3

[pelson]

I'm not sure I agree with the statement, even if it is factually correct at the moment. The problem is that a future version of the GRIB_API could come along which does support Python3 - I can't be certain, but it looks to me like if that did happen we wouldn't need a new Iris version.

We aren't taking away functionality from users at this point, so I'd be inclined to just make a mention of GRIB not being available on Py3 yet, rather than it being a fundamental limitation of Iris.

[marqh]

i've updated the wording, is this any better?

[pp-mo]

I know this is closed, but I'm puzzled..
The latest we have from @QuLogic (i.e. the branch https://github.com/QuLogic/iris/tree/py3k-grib) appears now to at least pass all the existing grib tests.
So, in the context of v1.9 release, @QuLogic @marqh : do we still need this warning, if the old code is still functional for now ?

[ajdawson]

I think we agreed that the change necessary to make GRIB work on Python 3 was not going to be included. The discussion is in the (closed) PR #1774 which is the py3k-grib branch you are referring to.

[pp-mo]

Thanks for explaining @ajdawson.
Sorry for a slip of the mouse : I meant to say https://github.com/QuLogic/iris/tree/py3k

But in any case, I think it is the same, if I misunderstood the status of this (and now have it right!)
I presume these commits are the contribution from py3k-grib, which will will not be including ?

e6b25f7 py3k: Re-set GRIB file loader after every message.
4fcd55a py3k: Be explicit about GRIB array type.

Assuming I've now got it, I'll add some python-3 specific skips to the things that break.

[ajdawson]

I believe that is accurate. If unsure I'd suggest you additionaly check with @rhattersley.

[rhattersley]

It all looks good to me. 👍 Thanks for pushing this forwards! 😄

(FYI, work commitments have dragged me away from much active involvement recently and for the next month or so, but I'm very happy to spout opinions where that helps! 😉)