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import numpy as np from pandas import ( DataFrame, Index, Series, ) import pandas._testing as tm def test_corrwith_with_1_axis(): # GH 47723 df = DataFrame({"a": [1, 1, 2], "b": [3, 7, 4]}) gb = df.groupby("a") msg = "DataFrameGroupBy.corrwith with axis=1 is deprecated" with tm.assert_produces_warning(FutureWarning, match=msg): result = gb.corrwith(df, axis=1) index = Index( data=[(1, 0), (1, 1), (1, 2), (2, 2), (2, 0), (2, 1)], name=("a", None), ) expected = Series([np.nan] * 6, index=index) tm.assert_series_equal(result, expected)
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