TST: Remove unused fixtures in tests (#45843)

Author: mroeschke

pandas/conftest.py

@@ -1776,7 +1776,7 @@ def indexer_ial(request):
 
 
 @pytest.fixture
-def using_array_manager(request):
+def using_array_manager():
     """
     Fixture to check if the array manager is being used.
     """

pandas/tests/apply/test_str.py

@@ -256,7 +256,7 @@ def test_transform_groupby_kernel_series(string_series, op):
 
 
 @pytest.mark.parametrize("op", frame_transform_kernels)
-def test_transform_groupby_kernel_frame(axis, float_frame, op, request):
+def test_transform_groupby_kernel_frame(axis, float_frame, op):
     # TODO(2.0) Remove after pad/backfill deprecation enforced
     op = maybe_normalize_deprecated_kernels(op)
     # GH 35964

pandas/tests/frame/indexing/test_where.py

@@ -98,7 +98,7 @@ def test_where_upcasting(self):
 
         tm.assert_series_equal(result, expected)
 
-    def test_where_alignment(self, where_frame, float_string_frame, mixed_int_frame):
+    def test_where_alignment(self, where_frame, float_string_frame):
         # aligning
         def _check_align(df, cond, other, check_dtypes=True):
             rs = df.where(cond, other)

pandas/tests/frame/methods/test_shift.py

@@ -611,7 +611,7 @@ def test_shift_dt64values_int_fill_deprecated(self):
     )
     # TODO(2.0): remove filtering
     @pytest.mark.filterwarnings("ignore:Index.ravel.*:FutureWarning")
-    def test_shift_dt64values_axis1_invalid_fill(self, vals, as_cat, request):
+    def test_shift_dt64values_axis1_invalid_fill(self, vals, as_cat):
         # GH#44564
         ser = Series(vals)
         if as_cat:

pandas/tests/indexes/period/test_constructors.py

@@ -534,9 +534,6 @@ def test_shallow_copy_requires_disallow_period_index(self):
 
 
 class TestSeriesPeriod:
-    def setup_method(self, method):
-        self.series = Series(period_range("2000-01-01", periods=10, freq="D"))
-
     def test_constructor_cant_cast_period(self):
         msg = "Cannot cast PeriodIndex to dtype float64"
         with pytest.raises(TypeError, match=msg):

pandas/tests/indexing/test_loc.py

@@ -1979,7 +1979,7 @@ def test_loc_setitem_with_expansion_inf_upcast_empty(self):
         tm.assert_index_equal(result, expected)
 
     @pytest.mark.filterwarnings("ignore:indexing past lexsort depth")
-    def test_loc_setitem_with_expansion_nonunique_index(self, index, request):
+    def test_loc_setitem_with_expansion_nonunique_index(self, index):
         # GH#40096
         if not len(index):
             return

pandas/tests/io/json/test_json_table_schema.py

@@ -24,20 +24,39 @@
 )
 
 
-class TestBuildSchema:
-    def setup_method(self, method):
-        self.df = DataFrame(
-            {
-                "A": [1, 2, 3, 4],
-                "B": ["a", "b", "c", "c"],
-                "C": pd.date_range("2016-01-01", freq="d", periods=4),
-                "D": pd.timedelta_range("1H", periods=4, freq="T"),
-            },
-            index=pd.Index(range(4), name="idx"),
-        )
+@pytest.fixture
+def df_schema():
+    return DataFrame(
+        {
+            "A": [1, 2, 3, 4],
+            "B": ["a", "b", "c", "c"],
+            "C": pd.date_range("2016-01-01", freq="d", periods=4),
+            "D": pd.timedelta_range("1H", periods=4, freq="T"),
+        },
+        index=pd.Index(range(4), name="idx"),
+    )
+
+
+@pytest.fixture
+def df_table():
+    return DataFrame(
+        {
+            "A": [1, 2, 3, 4],
+            "B": ["a", "b", "c", "c"],
+            "C": pd.date_range("2016-01-01", freq="d", periods=4),
+            "D": pd.timedelta_range("1H", periods=4, freq="T"),
+            "E": pd.Series(pd.Categorical(["a", "b", "c", "c"])),
+            "F": pd.Series(pd.Categorical(["a", "b", "c", "c"], ordered=True)),
+            "G": [1.0, 2.0, 3, 4.0],
+            "H": pd.date_range("2016-01-01", freq="d", periods=4, tz="US/Central"),
+        },
+        index=pd.Index(range(4), name="idx"),
+    )
 
-    def test_build_table_schema(self):
-        result = build_table_schema(self.df, version=False)
+
+class TestBuildSchema:
+    def test_build_table_schema(self, df_schema):
+        result = build_table_schema(df_schema, version=False)
         expected = {
             "fields": [
                 {"name": "idx", "type": "integer"},
@@ -49,7 +68,7 @@ def test_build_table_schema(self):
             "primaryKey": ["idx"],
         }
         assert result == expected
-        result = build_table_schema(self.df)
+        result = build_table_schema(df_schema)
         assert "pandas_version" in result
 
     def test_series(self):
@@ -77,8 +96,8 @@ def test_series_unnamed(self):
         }
         assert result == expected
 
-    def test_multiindex(self):
-        df = self.df.copy()
+    def test_multiindex(self, df_schema):
+        df = df_schema
         idx = pd.MultiIndex.from_product([("a", "b"), (1, 2)])
         df.index = idx
 
@@ -195,21 +214,6 @@ def test_as_json_table_type_categorical_dtypes(self):
 
 
 class TestTableOrient:
-    def setup_method(self, method):
-        self.df = DataFrame(
-            {
-                "A": [1, 2, 3, 4],
-                "B": ["a", "b", "c", "c"],
-                "C": pd.date_range("2016-01-01", freq="d", periods=4),
-                "D": pd.timedelta_range("1H", periods=4, freq="T"),
-                "E": pd.Series(pd.Categorical(["a", "b", "c", "c"])),
-                "F": pd.Series(pd.Categorical(["a", "b", "c", "c"], ordered=True)),
-                "G": [1.0, 2.0, 3, 4.0],
-                "H": pd.date_range("2016-01-01", freq="d", periods=4, tz="US/Central"),
-            },
-            index=pd.Index(range(4), name="idx"),
-        )
-
     def test_build_series(self):
         s = pd.Series([1, 2], name="a")
         s.index.name = "id"
@@ -259,8 +263,8 @@ def test_read_json_from_to_json_results(self):
     @pytest.mark.filterwarnings(
         "ignore:an integer is required (got type float)*:DeprecationWarning"
     )
-    def test_to_json(self):
-        df = self.df.copy()
+    def test_to_json(self, df_table):
+        df = df_table
         df.index.name = "idx"
         result = df.to_json(orient="table", date_format="iso")
         result = json.loads(result, object_pairs_hook=OrderedDict)
@@ -438,17 +442,17 @@ def test_to_json_categorical_index(self):
     @pytest.mark.filterwarnings(
         "ignore:an integer is required (got type float)*:DeprecationWarning"
     )
-    def test_date_format_raises(self):
+    def test_date_format_raises(self, df_table):
         msg = (
             "Trying to write with `orient='table'` and `date_format='epoch'`. Table "
             "Schema requires dates to be formatted with `date_format='iso'`"
         )
         with pytest.raises(ValueError, match=msg):
-            self.df.to_json(orient="table", date_format="epoch")
+            df_table.to_json(orient="table", date_format="epoch")
 
         # others work
-        self.df.to_json(orient="table", date_format="iso")
-        self.df.to_json(orient="table")
+        df_table.to_json(orient="table", date_format="iso")
+        df_table.to_json(orient="table")
 
     def test_convert_pandas_type_to_json_field_int(self, index_or_series):
         kind = index_or_series

pandas/tests/io/parser/test_parse_dates.py

@@ -1713,8 +1713,6 @@ def test_hypothesis_delimited_date(
                 "e.g. %m.%Y is a float or a date"
             )
         )
-    result, expected = None, None
-    except_in_dateutil, except_out_dateutil = None, None
     date_string = test_datetime.strftime(date_format.replace(" ", delimiter))
 
     with warnings.catch_warnings():

pandas/tests/io/pytables/test_round_trip.py

@@ -33,7 +33,7 @@
 pytestmark = pytest.mark.single
 
 
-def test_conv_read_write(setup_path):
+def test_conv_read_write():
     with tm.ensure_clean() as path:
 
         def roundtrip(key, obj, **kwargs):
@@ -491,20 +491,6 @@ def _check_roundtrip(obj, comparator, path, compression=False, **kwargs):
         comparator(retrieved, obj, **kwargs)
 
 
-def _check_double_roundtrip(self, obj, comparator, path, compression=False, **kwargs):
-    options = {}
-    if compression:
-        options["complib"] = compression or _default_compressor
-
-    with ensure_clean_store(path, "w", **options) as store:
-        store["obj"] = obj
-        retrieved = store["obj"]
-        comparator(retrieved, obj, **kwargs)
-        store["obj"] = retrieved
-        again = store["obj"]
-        comparator(again, obj, **kwargs)
-
-
 def _check_roundtrip_table(obj, comparator, path, compression=False):
     options = {}
     if compression:

pandas/tests/io/pytables/test_select.py

@@ -659,7 +659,7 @@ def test_frame_select_complex(setup_path):
         tm.assert_frame_equal(result, expected)
 
 
-def test_frame_select_complex2(setup_path):
+def test_frame_select_complex2():
 
     with ensure_clean_path(["params.hdf", "hist.hdf"]) as paths: