CLN: remove empty class creation parenteseses

Author: topper-123

pandas/tests/dtypes/test_inference.py

@@ -497,7 +497,7 @@ def test_mixed_dtypes_remain_object_array(self):
 class TestTypeInference:
 
     # Dummy class used for testing with Python objects
-    class Dummy():
+    class Dummy:
         pass
 
     def test_inferred_dtype_fixture(self, any_skipna_inferred_dtype):

pandas/tests/frame/test_alter_axes.py

@@ -13,7 +13,7 @@
 import pandas.util.testing as tm
 
 
-class TestDataFrameAlterAxes():
+class TestDataFrameAlterAxes:
 
     def test_set_index_directly(self, float_string_frame):
         df = float_string_frame

pandas/tests/frame/test_apply.py

@@ -29,7 +29,7 @@ def int_frame_const_col():
     return df
 
 
-class TestDataFrameApply():
+class TestDataFrameApply:
 
     def test_apply(self, float_frame):
         with np.errstate(all='ignore'):
@@ -829,7 +829,7 @@ def zip_frames(frames, axis=1):
         return pd.DataFrame(zipped)
 
 
-class TestDataFrameAggregate():
+class TestDataFrameAggregate:
 
     def test_agg_transform(self, axis, float_frame):
         other_axis = 1 if axis in {0, 'index'} else 0

pandas/tests/frame/test_asof.py

@@ -17,7 +17,7 @@ def date_range_frame():
     return DataFrame({'A': np.arange(N), 'B': np.arange(N)}, index=rng)
 
 
-class TestFrameAsof():
+class TestFrameAsof:
 
     def test_basic(self, date_range_frame):
         df = date_range_frame

pandas/tests/frame/test_block_internals.py

@@ -19,7 +19,7 @@
 # structure
 
 
-class TestDataFrameBlockInternals():
+class TestDataFrameBlockInternals:
     def test_setitem_invalidates_datetime_index_freq(self):
         # GH#24096 altering a datetime64tz column inplace invalidates the
         #  `freq` attribute on the underlying DatetimeIndex

pandas/tests/frame/test_combine_concat.py

@@ -9,7 +9,7 @@
 from pandas.util.testing import assert_frame_equal, assert_series_equal
 
 
-class TestDataFrameConcatCommon():
+class TestDataFrameConcatCommon:
 
     def test_concat_multiple_frames_dtypes(self):
 
@@ -530,7 +530,7 @@ def test_concat_astype_dup_col(self):
         tm.assert_frame_equal(result, expected)
 
 
-class TestDataFrameCombineFirst():
+class TestDataFrameCombineFirst:
 
     def test_combine_first_mixed(self):
         a = Series(['a', 'b'], index=range(2))
@@ -865,7 +865,7 @@ def test_concat_datetime_datetime64_frame(self):
         pd.concat([df1, df2_obj])
 
 
-class TestDataFrameUpdate():
+class TestDataFrameUpdate:
 
     def test_update_nan(self):
         # #15593 #15617

pandas/tests/frame/test_constructors.py

@@ -1001,7 +1001,7 @@ def __len__(self, n):
 
     def test_constructor_iterable(self):
         # GH 21987
-        class Iter():
+        class Iter:
             def __iter__(self):
                 for i in range(10):
                     yield [1, 2, 3]

pandas/tests/frame/test_missing.py

@@ -21,7 +21,7 @@ def _skip_if_no_pchip():
         pytest.skip('scipy.interpolate.pchip missing')
 
 
-class TestDataFrameMissingData():
+class TestDataFrameMissingData:
 
     def test_dropEmptyRows(self, float_frame):
         N = len(float_frame.index)
@@ -643,7 +643,7 @@ def test_fill_value_when_combine_const(self):
         assert_frame_equal(res, exp)
 
 
-class TestDataFrameInterpolate():
+class TestDataFrameInterpolate:
 
     def test_interp_basic(self):
         df = DataFrame({'A': [1, 2, np.nan, 4],

pandas/tests/frame/test_mutate_columns.py

@@ -10,7 +10,7 @@
 # Column add, remove, delete.
 
 
-class TestDataFrameMutateColumns():
+class TestDataFrameMutateColumns:
 
     def test_assign(self):
         df = DataFrame({'A': [1, 2, 3], 'B': [4, 5, 6]})

pandas/tests/groupby/test_grouping.py

@@ -93,7 +93,7 @@ def test_getitem_numeric_column_names(self):
 # grouping
 # --------------------------------
 
-class TestGrouping():
+class TestGrouping:
 
     def test_grouper_index_types(self):
         # related GH5375
@@ -556,7 +556,7 @@ def test_list_grouper_with_nat(self):
 # get_group
 # --------------------------------
 
-class TestGetGroup():
+class TestGetGroup:
     def test_get_group(self):
         # GH 5267
         # be datelike friendly
@@ -660,7 +660,7 @@ def test_gb_key_len_equal_axis_len(self):
 # groups & iteration
 # --------------------------------
 
-class TestIteration():
+class TestIteration:
 
     def test_groups(self, df):
         grouped = df.groupby(['A'])