Gluon-nlp: python2 end of life (will announce deprecation in 0.7)

[eric-haibin-lin]

@dmlc/gluon-nlp-team
Python2 will stop its support on January 1, 2020. We need to discuss a timeline to drop python2 support for gluon-nlp, too.

https://www.python.org/dev/peps/pep-0373/

There's also a discussion thread to drop py2 for mxnet https://lists.apache.org/thread.html/f8440615095c5472d1b16c554fca0fe5bad3fb8b20feaceba39ca694@%3Cdev.mxnet.apache.org%3E

[szha]

Some specific items to think about:

• when shall we start adding API that only supports py3? (I'd suggest immediately)
• when shall we remove support for py2 altogether? (I'd suggest in at least two more releases)

[leezu]

Let's announce the deprecation of Py2 with 0.7 release and remove the support with the 0.8 release.

[sxjscience]

+1 for deprecating py2 in 0.7

[szha]

Looks like the consensus is to announce deprecation of python2 support in 0.7.

[leezu]

I disabled the Python 2 jobs on our CI for pull-requests and the master branch.

[leezu]

@szha could you update the repository rules ("expected checks") on the Github side?

[szha]

updated. the python2 checks are no longer required.