CI/CLN: Lint more class references in tests

ci/code_checks.sh

@@ -38,8 +38,8 @@ function invgrep {
 }
 
 function check_namespace {
-    local -r CLASS="${1}"
-    grep -R -l --include "*.py" " ${CLASS}(" pandas/tests | xargs grep -n "pd\.${CLASS}("
+    local -r CLASS=${1}
+    grep -R -l --include "*.py" " ${CLASS}(" pandas/tests | xargs grep -n "pd\.${CLASS}[(\.]"
     test $? -gt 0
 }
 
@@ -146,7 +146,7 @@ if [[ -z "$CHECK" || "$CHECK" == "patterns" ]]; then
     RET=$(($RET + $?)) ; echo $MSG "DONE"
 
     MSG='Check for inconsistent use of pandas namespace in tests' ; echo $MSG
-    for class in "Series" "DataFrame" "Index"; do
+    for class in "Series" "DataFrame" "Index" "MultiIndex" "Timestamp" "Timedelta" "TimedeltaIndex" "DatetimeIndex" "Categorical"; do
         check_namespace ${class}
         RET=$(($RET + $?))
     done

pandas/tests/arithmetic/test_numeric.py

@@ -135,7 +135,7 @@ def test_mul_td64arr(self, left, box_cls):
         right = np.array([1, 2, 3], dtype="m8[s]")
         right = box_cls(right)
 
-        expected = pd.TimedeltaIndex(["10s", "40s", "90s"])
+        expected = TimedeltaIndex(["10s", "40s", "90s"])
         if isinstance(left, Series) or box_cls is Series:
             expected = Series(expected)
 
@@ -155,7 +155,7 @@ def test_div_td64arr(self, left, box_cls):
         right = np.array([10, 40, 90], dtype="m8[s]")
         right = box_cls(right)
 
-        expected = pd.TimedeltaIndex(["1s", "2s", "3s"])
+        expected = TimedeltaIndex(["1s", "2s", "3s"])
         if isinstance(left, Series) or box_cls is Series:
             expected = Series(expected)
 
@@ -189,7 +189,7 @@ def test_numeric_arr_mul_tdscalar(self, scalar_td, numeric_idx, box_with_array):
         # GH#19333
         box = box_with_array
         index = numeric_idx
-        expected = pd.TimedeltaIndex([pd.Timedelta(days=n) for n in range(len(index))])
+        expected = TimedeltaIndex([Timedelta(days=n) for n in range(len(index))])
 
         index = tm.box_expected(index, box)
         expected = tm.box_expected(expected, box)
@@ -244,10 +244,10 @@ def test_numeric_arr_rdiv_tdscalar(self, three_days, numeric_idx, box_with_array
     @pytest.mark.parametrize(
         "other",
         [
-            pd.Timedelta(hours=31),
-            pd.Timedelta(hours=31).to_pytimedelta(),
-            pd.Timedelta(hours=31).to_timedelta64(),
-            pd.Timedelta(hours=31).to_timedelta64().astype("m8[h]"),
+            Timedelta(hours=31),
+            Timedelta(hours=31).to_pytimedelta(),
+            Timedelta(hours=31).to_timedelta64(),
+            Timedelta(hours=31).to_timedelta64().astype("m8[h]"),
             np.timedelta64("NaT"),
             np.timedelta64("NaT", "D"),
             pd.offsets.Minute(3),

pandas/tests/arithmetic/test_object.py

@@ -196,17 +196,17 @@ def test_mixed_timezone_series_ops_object(self):
         # GH#13043
         ser = Series(
             [
-                pd.Timestamp("2015-01-01", tz="US/Eastern"),
-                pd.Timestamp("2015-01-01", tz="Asia/Tokyo"),
+                Timestamp("2015-01-01", tz="US/Eastern"),
+                Timestamp("2015-01-01", tz="Asia/Tokyo"),
             ],
             name="xxx",
         )
         assert ser.dtype == object
 
         exp = Series(
             [
-                pd.Timestamp("2015-01-02", tz="US/Eastern"),
-                pd.Timestamp("2015-01-02", tz="Asia/Tokyo"),
+                Timestamp("2015-01-02", tz="US/Eastern"),
+                Timestamp("2015-01-02", tz="Asia/Tokyo"),
             ],
             name="xxx",
         )
@@ -216,8 +216,8 @@ def test_mixed_timezone_series_ops_object(self):
         # object series & object series
         ser2 = Series(
             [
-                pd.Timestamp("2015-01-03", tz="US/Eastern"),
-                pd.Timestamp("2015-01-05", tz="Asia/Tokyo"),
+                Timestamp("2015-01-03", tz="US/Eastern"),
+                Timestamp("2015-01-05", tz="Asia/Tokyo"),
             ],
             name="xxx",
         )
@@ -326,7 +326,7 @@ def test_rsub_object(self):
             "foo" - index
 
         with pytest.raises(TypeError, match=msg):
-            np.array([True, pd.Timestamp.now()]) - index
+            np.array([True, Timestamp.now()]) - index
 
 
 class MyIndex(pd.Index):

pandas/tests/arithmetic/test_period.py

@@ -10,7 +10,7 @@
 from pandas.errors import PerformanceWarning
 
 import pandas as pd
-from pandas import PeriodIndex, Series, TimedeltaIndex, period_range
+from pandas import PeriodIndex, Series, Timedelta, TimedeltaIndex, period_range
 import pandas._testing as tm
 from pandas.core import ops
 from pandas.core.arrays import TimedeltaArray
@@ -41,9 +41,7 @@ def test_compare_zerodim(self, box_with_array):
         expected = tm.box_expected(expected, xbox)
         tm.assert_equal(result, expected)
 
-    @pytest.mark.parametrize(
-        "scalar", ["foo", pd.Timestamp.now(), pd.Timedelta(days=4)]
-    )
+    @pytest.mark.parametrize("scalar", ["foo", Timestamp.now(), Timedelta(days=4)])
     def test_compare_invalid_scalar(self, box_with_array, scalar):
         # comparison with scalar that cannot be interpreted as a Period
         pi = pd.period_range("2000", periods=4)
@@ -698,9 +696,9 @@ def test_parr_add_sub_float_raises(self, op, other, box_with_array):
         "other",
         [
             # datetime scalars
-            pd.Timestamp.now(),
-            pd.Timestamp.now().to_pydatetime(),
-            pd.Timestamp.now().to_datetime64(),
+            Timestamp.now(),
+            Timestamp.now().to_pydatetime(),
+            Timestamp.now().to_datetime64(),
             # datetime-like arrays
             pd.date_range("2016-01-01", periods=3, freq="H"),
             pd.date_range("2016-01-01", periods=3, tz="Europe/Brussels"),
@@ -733,7 +731,7 @@ def test_parr_add_sub_invalid(self, other, box_with_array):
 
     def test_pi_add_sub_td64_array_non_tick_raises(self):
         rng = pd.period_range("1/1/2000", freq="Q", periods=3)
-        tdi = pd.TimedeltaIndex(["-1 Day", "-1 Day", "-1 Day"])
+        tdi = TimedeltaIndex(["-1 Day", "-1 Day", "-1 Day"])
         tdarr = tdi.values
 
         msg = r"Cannot add or subtract timedelta64\[ns\] dtype from period\[Q-DEC\]"
@@ -752,7 +750,7 @@ def test_pi_add_sub_td64_array_tick(self):
         # PeriodIndex + Timedelta-like is allowed only with
         #   tick-like frequencies
         rng = pd.period_range("1/1/2000", freq="90D", periods=3)
-        tdi = pd.TimedeltaIndex(["-1 Day", "-1 Day", "-1 Day"])
+        tdi = TimedeltaIndex(["-1 Day", "-1 Day", "-1 Day"])
         tdarr = tdi.values
 
         expected = pd.period_range("12/31/1999", freq="90D", periods=3)
@@ -1227,7 +1225,7 @@ def test_parr_add_sub_object_array(self):
         pi = pd.period_range("2000-12-31", periods=3, freq="D")
         parr = pi.array
 
-        other = np.array([pd.Timedelta(days=1), pd.offsets.Day(2), 3])
+        other = np.array([Timedelta(days=1), pd.offsets.Day(2), 3])
 
         with tm.assert_produces_warning(PerformanceWarning):
             result = parr + other
@@ -1258,10 +1256,10 @@ def test_ops_series_timedelta(self):
             name="xxx",
         )
 
-        result = ser + pd.Timedelta("1 days")
+        result = ser + Timedelta("1 days")
         tm.assert_series_equal(result, expected)
 
-        result = pd.Timedelta("1 days") + ser
+        result = Timedelta("1 days") + ser
         tm.assert_series_equal(result, expected)
 
         result = ser + pd.tseries.offsets.Day()
@@ -1492,7 +1490,7 @@ def test_pi_sub_period(self):
         result = np.subtract(pd.Period("2012-01", freq="M"), idx)
         tm.assert_index_equal(result, exp)
 
-        exp = pd.TimedeltaIndex([np.nan, np.nan, np.nan, np.nan], name="idx")
+        exp = TimedeltaIndex([np.nan, np.nan, np.nan, np.nan], name="idx")
         result = idx - pd.Period("NaT", freq="M")
         tm.assert_index_equal(result, exp)
         assert result.freq == exp.freq
@@ -1506,7 +1504,7 @@ def test_pi_sub_pdnat(self):
         idx = PeriodIndex(
             ["2011-01", "2011-02", "NaT", "2011-04"], freq="M", name="idx"
         )
-        exp = pd.TimedeltaIndex([pd.NaT] * 4, name="idx")
+        exp = TimedeltaIndex([pd.NaT] * 4, name="idx")
         tm.assert_index_equal(pd.NaT - idx, exp)
         tm.assert_index_equal(idx - pd.NaT, exp)
 
@@ -1525,7 +1523,7 @@ def test_pi_sub_period_nat(self):
         exp = pd.Index([12 * off, pd.NaT, 10 * off, 9 * off], name="idx")
         tm.assert_index_equal(result, exp)
 
-        exp = pd.TimedeltaIndex([np.nan, np.nan, np.nan, np.nan], name="idx")
+        exp = TimedeltaIndex([np.nan, np.nan, np.nan, np.nan], name="idx")
         tm.assert_index_equal(idx - pd.Period("NaT", freq="M"), exp)
         tm.assert_index_equal(pd.Period("NaT", freq="M") - idx, exp)
 

pandas/tests/arithmetic/test_timedelta64.py

@@ -119,7 +119,7 @@ def test_td64arr_cmp_arraylike_invalid(self, other):
     def test_td64arr_cmp_mixed_invalid(self):
         rng = timedelta_range("1 days", periods=5)._data
 
-        other = np.array([0, 1, 2, rng[3], pd.Timestamp.now()])
+        other = np.array([0, 1, 2, rng[3], Timestamp.now()])
         result = rng == other
         expected = np.array([False, False, False, True, False])
         tm.assert_numpy_array_equal(result, expected)
@@ -143,10 +143,8 @@ class TestTimedelta64ArrayComparisons:
 
     @pytest.mark.parametrize("dtype", [None, object])
     def test_comp_nat(self, dtype):
-        left = pd.TimedeltaIndex(
-            [pd.Timedelta("1 days"), pd.NaT, pd.Timedelta("3 days")]
-        )
-        right = pd.TimedeltaIndex([pd.NaT, pd.NaT, pd.Timedelta("3 days")])
+        left = TimedeltaIndex([Timedelta("1 days"), pd.NaT, Timedelta("3 days")])
+        right = TimedeltaIndex([pd.NaT, pd.NaT, Timedelta("3 days")])
 
         lhs, rhs = left, right
         if dtype is object:
@@ -173,7 +171,7 @@ def test_comp_nat(self, dtype):
         tm.assert_numpy_array_equal(pd.NaT > lhs, expected)
 
     def test_comparisons_nat(self):
-        tdidx1 = pd.TimedeltaIndex(
+        tdidx1 = TimedeltaIndex(
             [
                 "1 day",
                 pd.NaT,
@@ -183,7 +181,7 @@ def test_comparisons_nat(self):
                 "5 day 00:00:03",
             ]
         )
-        tdidx2 = pd.TimedeltaIndex(
+        tdidx2 = TimedeltaIndex(
             ["2 day", "2 day", pd.NaT, pd.NaT, "1 day 00:00:02", "5 days 00:00:03"]
         )
         tdarr = np.array(
@@ -1030,7 +1028,7 @@ def test_tdi_sub_dt64_array(self, box_with_array):
         dti = pd.date_range("2016-01-01", periods=3)
         tdi = dti - dti.shift(1)
         dtarr = dti.values
-        expected = pd.DatetimeIndex(dtarr) - tdi
+        expected = DatetimeIndex(dtarr) - tdi
 
         tdi = tm.box_expected(tdi, box_with_array)
         expected = tm.box_expected(expected, box_with_array)
@@ -1047,7 +1045,7 @@ def test_tdi_add_dt64_array(self, box_with_array):
         dti = pd.date_range("2016-01-01", periods=3)
         tdi = dti - dti.shift(1)
         dtarr = dti.values
-        expected = pd.DatetimeIndex(dtarr) + tdi
+        expected = DatetimeIndex(dtarr) + tdi
 
         tdi = tm.box_expected(tdi, box_with_array)
         expected = tm.box_expected(expected, box_with_array)
@@ -1062,7 +1060,7 @@ def test_td64arr_add_datetime64_nat(self, box_with_array):
         other = np.datetime64("NaT")
 
         tdi = timedelta_range("1 day", periods=3)
-        expected = pd.DatetimeIndex(["NaT", "NaT", "NaT"])
+        expected = DatetimeIndex(["NaT", "NaT", "NaT"])
 
         tdser = tm.box_expected(tdi, box_with_array)
         expected = tm.box_expected(expected, box_with_array)
@@ -1246,9 +1244,9 @@ def test_td64arr_add_sub_tdi(self, box_with_array, names):
     def test_td64arr_add_sub_td64_nat(self, box_with_array):
         # GH#23320 special handling for timedelta64("NaT")
         box = box_with_array
-        tdi = pd.TimedeltaIndex([NaT, Timedelta("1s")])
+        tdi = TimedeltaIndex([NaT, Timedelta("1s")])
         other = np.timedelta64("NaT")
-        expected = pd.TimedeltaIndex(["NaT"] * 2)
+        expected = TimedeltaIndex(["NaT"] * 2)
 
         obj = tm.box_expected(tdi, box)
         expected = tm.box_expected(expected, box)
@@ -1472,14 +1470,14 @@ def test_td64arr_add_sub_object_array(self, box_with_array):
         tdarr = tm.box_expected(tdi, box)
 
         other = np.array(
-            [pd.Timedelta(days=1), pd.offsets.Day(2), pd.Timestamp("2000-01-04")]
+            [Timedelta(days=1), pd.offsets.Day(2), Timestamp("2000-01-04")]
         )
 
         with tm.assert_produces_warning(PerformanceWarning):
             result = tdarr + other
 
         expected = pd.Index(
-            [pd.Timedelta(days=2), pd.Timedelta(days=4), pd.Timestamp("2000-01-07")]
+            [Timedelta(days=2), Timedelta(days=4), Timestamp("2000-01-07")]
         )
         expected = tm.box_expected(expected, xbox)
         tm.assert_equal(result, expected)
@@ -1492,9 +1490,7 @@ def test_td64arr_add_sub_object_array(self, box_with_array):
         with tm.assert_produces_warning(PerformanceWarning):
             result = other - tdarr
 
-        expected = pd.Index(
-            [pd.Timedelta(0), pd.Timedelta(0), pd.Timestamp("2000-01-01")]
-        )
+        expected = pd.Index([Timedelta(0), Timedelta(0), Timestamp("2000-01-01")])
         expected = tm.box_expected(expected, xbox)
         tm.assert_equal(result, expected)
 
@@ -2188,9 +2184,9 @@ def test_td64arr_pow_invalid(self, scalar_td, box_with_array):
 
 def test_add_timestamp_to_timedelta():
     # GH: 35897
-    timestamp = pd.Timestamp.now()
+    timestamp = Timestamp.now()
     result = timestamp + pd.timedelta_range("0s", "1s", periods=31)
-    expected = pd.DatetimeIndex(
+    expected = DatetimeIndex(
         [
             timestamp
             + (

pandas/tests/arrays/categorical/test_constructors.py

@@ -54,7 +54,7 @@ def test_constructor_empty(self):
 
     def test_constructor_empty_boolean(self):
         # see gh-22702
-        cat = pd.Categorical([], categories=[True, False])
+        cat = Categorical([], categories=[True, False])
         categories = sorted(cat.categories.tolist())
         assert categories == [False, True]
 
@@ -412,7 +412,7 @@ def test_constructor_str_unknown(self):
 
     def test_constructor_np_strs(self):
         # GH#31499 Hastable.map_locations needs to work on np.str_ objects
-        cat = pd.Categorical(["1", "0", "1"], [np.str_("0"), np.str_("1")])
+        cat = Categorical(["1", "0", "1"], [np.str_("0"), np.str_("1")])
         assert all(isinstance(x, np.str_) for x in cat.categories)
 
     def test_constructor_from_categorical_with_dtype(self):
@@ -637,48 +637,48 @@ def test_constructor_imaginary(self):
 
     def test_constructor_string_and_tuples(self):
         # GH 21416
-        c = pd.Categorical(np.array(["c", ("a", "b"), ("b", "a"), "c"], dtype=object))
+        c = Categorical(np.array(["c", ("a", "b"), ("b", "a"), "c"], dtype=object))
         expected_index = Index([("a", "b"), ("b", "a"), "c"])
         assert c.categories.equals(expected_index)
 
     def test_interval(self):
         idx = pd.interval_range(0, 10, periods=10)
-        cat = pd.Categorical(idx, categories=idx)
+        cat = Categorical(idx, categories=idx)
         expected_codes = np.arange(10, dtype="int8")
         tm.assert_numpy_array_equal(cat.codes, expected_codes)
         tm.assert_index_equal(cat.categories, idx)
 
         # infer categories
-        cat = pd.Categorical(idx)
+        cat = Categorical(idx)
         tm.assert_numpy_array_equal(cat.codes, expected_codes)
         tm.assert_index_equal(cat.categories, idx)
 
         # list values
-        cat = pd.Categorical(list(idx))
+        cat = Categorical(list(idx))
         tm.assert_numpy_array_equal(cat.codes, expected_codes)
         tm.assert_index_equal(cat.categories, idx)
 
         # list values, categories
-        cat = pd.Categorical(list(idx), categories=list(idx))
+        cat = Categorical(list(idx), categories=list(idx))
         tm.assert_numpy_array_equal(cat.codes, expected_codes)
         tm.assert_index_equal(cat.categories, idx)
 
         # shuffled
         values = idx.take([1, 2, 0])
-        cat = pd.Categorical(values, categories=idx)
+        cat = Categorical(values, categories=idx)
         tm.assert_numpy_array_equal(cat.codes, np.array([1, 2, 0], dtype="int8"))
         tm.assert_index_equal(cat.categories, idx)
 
         # extra
         values = pd.interval_range(8, 11, periods=3)
-        cat = pd.Categorical(values, categories=idx)
+        cat = Categorical(values, categories=idx)
         expected_codes = np.array([8, 9, -1], dtype="int8")
         tm.assert_numpy_array_equal(cat.codes, expected_codes)
         tm.assert_index_equal(cat.categories, idx)
 
         # overlapping
         idx = pd.IntervalIndex([pd.Interval(0, 2), pd.Interval(0, 1)])
-        cat = pd.Categorical(idx, categories=idx)
+        cat = Categorical(idx, categories=idx)
         expected_codes = np.array([0, 1], dtype="int8")
         tm.assert_numpy_array_equal(cat.codes, expected_codes)
         tm.assert_index_equal(cat.categories, idx)