pre-commit style fixes

Author: tserrao

doc/source/whatsnew/v3.0.0.rst

@@ -42,13 +42,13 @@ Other enhancements
 - :func:`DataFrame.to_excel` argument ``merge_cells`` now accepts a value of ``"columns"`` to only merge :class:`MultiIndex` column header header cells (:issue:`35384`)
 - :meth:`DataFrame.corrwith` now accepts ``min_periods`` as optional arguments, as in :meth:`DataFrame.corr` and :meth:`Series.corr` (:issue:`9490`)
 - :meth:`DataFrame.cummin`, :meth:`DataFrame.cummax`, :meth:`DataFrame.cumprod` and :meth:`DataFrame.cumsum` methods now have a ``numeric_only`` parameter (:issue:`53072`)
+- :meth:`DataFrame.ewm` now allows ``adjust=False`` when ``times`` is provided (:issue:`54328`)
 - :meth:`DataFrame.fillna` and :meth:`Series.fillna` can now accept ``value=None``; for non-object dtype the corresponding NA value will be used (:issue:`57723`)
 - :meth:`DataFrame.pivot_table` and :func:`pivot_table` now allow the passing of keyword arguments to ``aggfunc`` through ``**kwargs`` (:issue:`57884`)
 - :meth:`Series.cummin` and :meth:`Series.cummax` now supports :class:`CategoricalDtype` (:issue:`52335`)
 - :meth:`Series.plot` now correctly handle the ``ylabel`` parameter for pie charts, allowing for explicit control over the y-axis label (:issue:`58239`)
 - Restore support for reading Stata 104-format and enable reading 103-format dta files (:issue:`58554`)
 - Support reading Stata 110-format (Stata 7) dta files (:issue:`47176`)
-- :meth:`DataFrame.ewm` now allows ``adjust=False`` when ``times`` is provided (:issue:`54328`)
 
 .. ---------------------------------------------------------------------------
 .. _whatsnew_300.notable_bug_fixes:

pandas/core/window/ewm.py

@@ -377,8 +377,10 @@ def __init__(
             # But allow COM to still be calculated if the user passes other decay args
             if common.count_not_none(self.com, self.span, self.alpha) > 0:
                 if not self.adjust:
-                    raise NotImplementedError('None of com, span, or alpha can be specified if '
-                                              'times is provided and adjust=False')
+                    raise NotImplementedError(
+                        "None of com, span, or alpha can be specified if "
+                        "times is provided and adjust=False"
+                    )
                 self._com = get_center_of_mass(self.com, self.span, None, self.alpha)
             else:
                 self._com = 1.0

pandas/core/window/numba_.py

@@ -151,7 +151,7 @@ def ewm(
                             old_wt *= old_wt_factor ** deltas[start + j - 1]
                             if not adjust and com == 1:
                                 # update alpha "on the fly" for irregular-interval time series
-                                new_wt = 1. - old_wt
+                                new_wt = 1.0 - old_wt
                         else:
                             weighted = old_wt_factor * weighted
                         if is_observation:
@@ -329,7 +329,7 @@ def ewm_table(
                             old_wt[j] *= old_wt_factor ** deltas[i - 1]
                             if not adjust and com == 1:
                                 # update alpha "on the fly" for irregular-interval time series
-                                new_wt = 1. - old_wt[j]
+                                new_wt = 1.0 - old_wt[j]
                         else:
                             weighted[j] = old_wt_factor * weighted[j]
                         if is_observations[j]:

pandas/tests/window/test_ewm.py

@@ -103,7 +103,7 @@ def test_ewma_with_times_equal_spacing(halflife_with_times, times, min_periods):
 
 
 def test_ewma_with_times_variable_spacing(tz_aware_fixture, unit, adjust):
-    #GH 54328
+    # GH 54328
     tz = tz_aware_fixture
     halflife = "23 days"
     times = (
@@ -155,30 +155,44 @@ def test_ewm_getitem_attributes_retained(arg, adjust, ignore_na):
 def test_ewma_times_adjust_false_with_disallowed_com():
     # GH 54328
     with pytest.raises(
-            NotImplementedError, match='None of com, span, or alpha can be specified if times is provided and adjust=False'
+        NotImplementedError,
+        match="None of com, span, or alpha can be specified if times is provided and adjust=False",
     ):
         Series(range(1)).ewm(
-            0.1, adjust=False, times=date_range("2000", freq="D", periods=1), halflife='1D'
+            0.1,
+            adjust=False,
+            times=date_range("2000", freq="D", periods=1),
+            halflife="1D",
         )
 
 
 def test_ewma_times_adjust_false_with_disallowed_alpha():
     # GH 54328
     with pytest.raises(
-            NotImplementedError, match='None of com, span, or alpha can be specified if times is provided and adjust=False'
+        NotImplementedError,
+        match="None of com, span, or alpha can be specified if times is provided and adjust=False",
     ):
         Series(range(1)).ewm(
-            0.1, adjust=False, times=date_range("2000", freq="D", periods=1), alpha=0.5, halflife='1D'
+            0.1,
+            adjust=False,
+            times=date_range("2000", freq="D", periods=1),
+            alpha=0.5,
+            halflife="1D",
         )
 
 
 def test_ewma_times_adjust_false_with_disallowed_span():
     # GH 54328
     with pytest.raises(
-            NotImplementedError, match='None of com, span, or alpha can be specified if times is provided and adjust=False'
+        NotImplementedError,
+        match="None of com, span, or alpha can be specified if times is provided and adjust=False",
     ):
         Series(range(1)).ewm(
-            0.1, adjust=False, times=date_range("2000", freq="D", periods=1), span=10, halflife='1D'
+            0.1,
+            adjust=False,
+            times=date_range("2000", freq="D", periods=1),
+            span=10,
+            halflife="1D",
         )