Python 3.8.0 in the prerelease label

[h-vetinari]

[Copied essentially verbatim from #177, @jjhelmus]

It would be great to provide Python 3.8.0 package in the prerelease label. I see that this channel includes everything from 3.6a3-3.6rc1, but has nothing for 3.7. I'm opening this early so we can make sure 3.8 doesn't suffer the same fate. ;-)

For numpy/pandas etc. it would be good to be able to test this as early as possible.

PEP 569 has the release schedule for the new version:

Version	Expected date
3.8.0 alpha 3	Monday, 2019-03-25
3.8.0 alpha 4	Monday, 2019-04-29
3.8.0 beta 1	Monday, 2019-05-27 (No new features beyond this point.)
3.8.0 beta 2	Monday, 2019-06-24
3.8.0 beta 3	Monday, 2019-07-29
3.8.0 beta 4	Monday, 2019-08-26
3.8.0 candidate 1	Monday, 2019-09-30
3.8.0 candidate 2	Monday, 2019-10-07 (if necessary)
3.8.0 final	Monday, 2019-10-21

[h-vetinari]

@jjhelmus @ocefpaf @isuruf
Can I ask for a response to this please? :)
Is it something that's realistic?

[ocefpaf]

Is it something that's realistic?

Not sure what you mean by realistic? Do you want to send a PR for 3.8 to the rc channel? If so, please do!

[h-vetinari]

@ocefpaf: Not sure what you mean by realistic? Do you want to send a PR for 3.8 to the rc channel? If so, please do!

I haven't worked with conda recipes before. If you can point me to something I can work off of (for pre-release work), I'll try to have a look!

[jakirkham]

Sure, maybe you can try some variation of this commit ( 40fbebb ) to start a new PR. IOW bump the version and update checksum. There may be more work that follows, but that would be a good first step.

[jjhelmus]

closed by #258

[h-vetinari]

@jjhelmus
Thanks a lot for seeing this through (I barely did anything)!

This issue also covers the betas/rcs, but I'm guessing the those will be much easier now that we got something that passes the build, so probably fine to leave this closed.

[jjhelmus]

Yes future alpha, betas and rc release should be easier now that one of these releases is available on conda-forge. alpha 4 is schedule for release soon. There are two small fixes I want to get into the recipe when this is released.

[cdeil]

It's out: https://docs.python.org/3/whatsnew/3.8.html

Is there an issue one can watch or timescale when Python 3.8 becomes available?

[jjhelmus]

Is there an issue one can watch

#274