DEPR: GroupBy.dtypes

[jbrockmendel]

df = pd.DataFrame(
        {
            "A": ["foo", "bar", "foo", "bar", "foo", "bar", "foo", "foo"],
            "B": ["one", "one", "two", "three", "two", "two", "one", "three"],
            "C": np.random.randn(8),
            "D": np.random.randn(8),
        }
    )

rng = pd.date_range("2014", periods=len(df))
df.columns.name = "foo"
df.index = rng

g = df.groupby(["A"])[["C"]]
g_exp = df[["C"]].groupby(df["A"])

tm.assert_frame_equal(g.dtypes, g_exp.dtypes)

>>> print(g.dtypes)
foo        C
A           
bar  float64
foo  float64

Not clear to me what this is supposed to mean. The example above is from the one test we have (test_groupby_selection_other_methods) that gets here. Shouldn't a user just check df["C"].dtype in this case?

[rhshadrach]

+1 for deprecating.