DEPR: Pandas 0.24.0 Deprecations

[TomAugspurger]

We'd like to have all these deprecations in place for 0.24.0, and enforced in 1.0

As a reminder, the plan is to have no new deprecations in 0.25.x and 1.0.0. So this is the last round of deprecations before 1.0.

• Series.rename(scalar) -> Series.set_name (xref API: allow DataFrame.rename to take a list-like of colums #14829)
• NDFrame.filter
• NDFrame.between? (DEPR: pd.Series.between #13027)

cc @pandas-dev/pandas-core

[TomAugspurger]

@jorisvandenbossche @jreback do you know the current thoughts on deprecating filter? Just need someone to do it? I'm going to do Series.rename(scalar) now, will follow up with filter if so.

If people have thoughts on .between, discuss in #13027 and I'll update here.

Feel free to add additional deprecations that we don't want to live with for 1.x.

[shoyer]

@TomAugspurger I hate to revisit things... but do you mind holding off for a little while on Series.rename? I'd like to take a look at #14829, maybe revisit some alternative APIs...

[TomAugspurger]

No worries. I think the decision on Series.rename(scalar) does depend on the decision in #14829.

[jorisvandenbossche]

As I said during the sprint, I am personally not in favor of deprecating the full filter method, but would rather like to deprecate the default axis, so we can keep it for the obvious behaviour (but need to look into it in more detail to explore if this is somewhat possible).

[TomAugspurger]

but would rather like to deprecate the default axis

When you get a chance, can you write that up? I'm having trouble recalling the discussion.

[topper-123]

I think NDFrame.filter provides some nice functionality, but has an unfortunate name that can be mixed up with Groupby.filter.

I'd like to keep it, but rename it to something else perhaps.

[jreback]

I think between is ok (no deprecation)

what happened to the original list which was much longer?

[topper-123]

Older longer list: #18262

[h-vetinari]

Most likely too late to the game, but for completeness I'd like to add: if #21855 #21858 are solved for v0.24, then combine_first could be deprecated at the same time, see #21859.

[TomAugspurger]

Sorry, I forgot about #18262

Let's move this discussion there.