DEPR: pandas.core, pandas.util.testing

[jreback]

xref #16223

These are the only remaining 'public'-ish directories that are not explicitly exposed. In 0.20.0 we make these 'private' in documentation. We should actually deprecate these and move to _core and pandas.util.testing -> pandas.core.testing

This will need a DeprecationWarning as likely lots of code that is out there that uses this.

[jorisvandenbossche]

I think this is for 0.21 ? (we shouldn't do deprecations in a bugfix release)

[jreback]

yep that was a typo

[jreback]

not sure can actually do this, but should try for 1.0

[jorisvandenbossche]

I am also not sure we can do core, but we might want to do util.testing, as we have pandas.testing as alternative. The probable problem is that we have only put few things there, and people are using other functionality from util.testing like the make.. functions.

[TomAugspurger]

Is this any different from #27522? I guess just pandas.util.testing, and leave #27522 for pandas.core?