updated testcases & whatsnew

Author: dannyi96

doc/source/whatsnew/v2.1.0.rst

@@ -99,6 +99,7 @@ Deprecations
 - Deprecated ``axis=1`` in :meth:`DataFrame.groupby` and in :class:`Grouper` constructor, do ``frame.T.groupby(...)`` instead (:issue:`51203`)
 - Deprecated passing a :class:`DataFrame` to :meth:`DataFrame.from_records`, use :meth:`DataFrame.set_index` or :meth:`DataFrame.drop` instead (:issue:`51353`)
 - Deprecated accepting slices in :meth:`DataFrame.take`, call ``obj[slicer]`` or pass a sequence of integers instead (:issue:`51539`)
+- Deprecated ``axis=1`` in :meth:`DataFrame.resample`, do ``frame.T.resample(...)`` instead (:issue:`51778`)
 -
 
 .. ---------------------------------------------------------------------------

pandas/tests/resample/test_datetime_index.py

@@ -641,12 +641,16 @@ def test_resample_dup_index():
         columns=[Period(year=2000, month=i + 1, freq="M") for i in range(12)],
     )
     df.iloc[3, :] = np.nan
-    result = df.resample("Q", axis=1).mean()
-    msg = "DataFrame.groupby with axis=1 is deprecated"
-    with tm.assert_produces_warning(FutureWarning, match=msg):
-        expected = df.groupby(lambda x: int((x.month - 1) / 3), axis=1).mean()
-    expected.columns = [Period(year=2000, quarter=i + 1, freq="Q") for i in range(4)]
-    tm.assert_frame_equal(result, expected)
+    warning_msg = "DataFrame.resample with axis=1 is deprecated."
+    with tm.assert_produces_warning(FutureWarning, match=warning_msg):
+        result = df.resample("Q", axis=1).mean()
+        msg = "DataFrame.groupby with axis=1 is deprecated"
+        with tm.assert_produces_warning(FutureWarning, match=msg):
+            expected = df.groupby(lambda x: int((x.month - 1) / 3), axis=1).mean()
+        expected.columns = [
+            Period(year=2000, quarter=i + 1, freq="Q") for i in range(4)
+        ]
+        tm.assert_frame_equal(result, expected)
 
 
 def test_resample_reresample(unit):
@@ -729,9 +733,11 @@ def test_resample_axis1(unit):
     rng = date_range("1/1/2000", "2/29/2000").as_unit(unit)
     df = DataFrame(np.random.randn(3, len(rng)), columns=rng, index=["a", "b", "c"])
 
-    result = df.resample("M", axis=1).mean()
-    expected = df.T.resample("M").mean().T
-    tm.assert_frame_equal(result, expected)
+    warning_msg = "DataFrame.resample with axis=1 is deprecated."
+    with tm.assert_produces_warning(FutureWarning, match=warning_msg):
+        result = df.resample("M", axis=1).mean()
+        expected = df.T.resample("M").mean().T
+        tm.assert_frame_equal(result, expected)
 
 
 @pytest.mark.parametrize("freq", ["t", "5t", "15t", "30t", "4h", "12h"])

pandas/tests/resample/test_resample_api.py

@@ -570,9 +570,13 @@ def test_multi_agg_axis_1_raises(func):
     index = date_range(datetime(2005, 1, 1), datetime(2005, 1, 10), freq="D")
     index.name = "date"
     df = DataFrame(np.random.rand(10, 2), columns=list("AB"), index=index).T
-    res = df.resample("M", axis=1)
-    with pytest.raises(NotImplementedError, match="axis other than 0 is not supported"):
-        res.agg(func)
+    warning_msg = "DataFrame.resample with axis=1 is deprecated."
+    with tm.assert_produces_warning(FutureWarning, match=warning_msg):
+        res = df.resample("M", axis=1)
+        with pytest.raises(
+            NotImplementedError, match="axis other than 0 is not supported"
+        ):
+            res.agg(func)
 
 
 def test_agg_nested_dicts():