DEPR: pd.Grouper?

[jbrockmendel]

I guess the point of Grouper is to allow for finer customization of groupby behavior? My hope is that it is a historical artifact and we can now do anything we need without it. Any idea if this is the case?

[jreback]

the main use of this was to do grouping and resampling simultaneously but we can easily use groupby..resample

so maybe it's possible to deprecate this

[rhshadrach]

Searching SO, I'm seeing a lot of questions of the form "How do I do this with pd.Grouper?" and the answer does not use pd.Grouper. I haven't found a question that can't be done without resample.

+1 on deprecating

[NowanIlfideme]

What the .groupby().resample() examples miss are cases when you want to pass "grouping arguments" from one function to another. There isn't a clean way to do that besides pd.Grouper and strings within a list, as far as I'm aware - everything else would need to either specifically check for frequency resampling, or create an auxiliary column of the new periodicity. I'd be glad to be proven wrong. 😃

[jbrockmendel]

@NowanIlfideme thanks for clarifying this for me!