Remove ge 311 checks

mroeschke · mroeschke · commit f4c0035c9d3e · 2025-08-07T11:44:21.000-07:00
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
@@ -45,7 +45,6 @@ repos:
     hooks:
     -   id: codespell
         types_or: [python, rst, markdown, cython, c]
-        additional_dependencies: [tomli]
 -   repo: https://github.com/MarcoGorelli/cython-lint
     rev: v0.16.7
     hooks:
@@ -235,7 +234,7 @@ repos:
         entry: python scripts/generate_pip_deps_from_conda.py
         files: ^(environment.yml|requirements-dev.txt)$
         pass_filenames: false
-        additional_dependencies: [tomli, pyyaml]
+        additional_dependencies: [pyyaml]
     -   id: title-capitalization
         name: Validate correct capitalization among titles in documentation
         entry: python scripts/validate_rst_title_capitalization.py
@@ -290,7 +289,7 @@ repos:
         entry: python -m scripts.validate_min_versions_in_sync
         language: python
         files: ^(ci/deps/actions-.*-minimum_versions\.yaml|pandas/compat/_optional\.py)$
-        additional_dependencies: [tomli, pyyaml]
+        additional_dependencies: [pyyaml]
         pass_filenames: false
     -   id: validate-errors-locations
         name: Validate errors locations
diff --git a/ci/meta.yaml b/ci/meta.yaml
@@ -31,7 +31,6 @@ requirements:
     - numpy >=1.21.6  # [py<311]
     - numpy >=1.23.2  # [py>=311]
     - versioneer
-    - tomli  # [py<311]
   run:
     - python
     - numpy >=1.21.6  # [py<311]
@@ -66,7 +65,6 @@ test:
     - pytest-xdist >=3.4.0
     - pytest-cov
     - hypothesis >=6.84.0
-    - tomli  # [py<311]
 
 about:
   home: http://pandas.pydata.org
diff --git a/pandas/_testing/_warnings.py b/pandas/_testing/_warnings.py
@@ -16,8 +16,6 @@
 )
 import warnings
 
-from pandas.compat import PY311
-
 if TYPE_CHECKING:
     from collections.abc import (
         Generator,
@@ -216,7 +214,7 @@ def _assert_caught_no_extra_warnings(
                 # due to these open files.
                 if any("matplotlib" in mod for mod in sys.modules):
                     continue
-            if PY311 and actual_warning.category == EncodingWarning:
+            if actual_warning.category == EncodingWarning:
                 # EncodingWarnings are checked in the CI
                 # pyproject.toml errors on EncodingWarnings in pandas
                 # Ignore EncodingWarnings from other libraries
diff --git a/pandas/compat/__init__.py b/pandas/compat/__init__.py
@@ -18,7 +18,6 @@
 from pandas.compat._constants import (
     IS64,
     ISMUSL,
-    PY311,
     PY312,
     PYPY,
     WASM,
@@ -155,7 +154,6 @@ def is_ci_environment() -> bool:
     "HAS_PYARROW",
     "IS64",
     "ISMUSL",
-    "PY311",
     "PY312",
     "PYPY",
     "WASM",
diff --git a/pandas/compat/_constants.py b/pandas/compat/_constants.py
@@ -13,17 +13,15 @@
 
 IS64 = sys.maxsize > 2**32
 
-PY311 = sys.version_info >= (3, 11)
 PY312 = sys.version_info >= (3, 12)
 PYPY = platform.python_implementation() == "PyPy"
 WASM = (sys.platform == "emscripten") or (platform.machine() in ["wasm32", "wasm64"])
 ISMUSL = "musl" in (sysconfig.get_config_var("HOST_GNU_TYPE") or "")
-REF_COUNT = 2 if PY311 else 3
+REF_COUNT = 2
 
 __all__ = [
     "IS64",
     "ISMUSL",
-    "PY311",
     "PY312",
     "PYPY",
     "WASM",
diff --git a/pandas/tests/arrays/categorical/test_api.py b/pandas/tests/arrays/categorical/test_api.py
@@ -3,8 +3,6 @@
 import numpy as np
 import pytest
 
-from pandas.compat import PY311
-
 from pandas import (
     Categorical,
     CategoricalIndex,
@@ -47,11 +45,7 @@ def test_set_ordered(self):
         assert not cat2.set_ordered(False).ordered
 
         # removed in 0.19.0
-        msg = (
-            "property 'ordered' of 'Categorical' object has no setter"
-            if PY311
-            else "can't set attribute"
-        )
+        msg = "property 'ordered' of 'Categorical' object has no setter"
         with pytest.raises(AttributeError, match=msg):
             cat.ordered = True
         with pytest.raises(AttributeError, match=msg):
@@ -435,11 +429,7 @@ def test_codes_immutable(self):
         tm.assert_numpy_array_equal(c.codes, exp)
 
         # Assignments to codes should raise
-        msg = (
-            "property 'codes' of 'Categorical' object has no setter"
-            if PY311
-            else "can't set attribute"
-        )
+        msg = "property 'codes' of 'Categorical' object has no setter"
         with pytest.raises(AttributeError, match=msg):
             c.codes = np.array([0, 1, 2, 0, 1], dtype="int8")
 
diff --git a/pandas/tests/extension/test_arrow.py b/pandas/tests/extension/test_arrow.py
@@ -35,7 +35,6 @@
 from pandas._libs import lib
 from pandas._libs.tslibs import timezones
 from pandas.compat import (
-    PY311,
     PY312,
     is_ci_environment,
     is_platform_windows,
@@ -344,13 +343,7 @@ def test_from_sequence_pa_array_notimplemented(self, request):
 
     def test_from_sequence_of_strings_pa_array(self, data, request):
         pa_dtype = data.dtype.pyarrow_dtype
-        if pa.types.is_time64(pa_dtype) and pa_dtype.equals("time64[ns]") and not PY311:
-            request.applymarker(
-                pytest.mark.xfail(
-                    reason="Nanosecond time parsing not supported.",
-                )
-            )
-        elif pa.types.is_timestamp(pa_dtype) and pa_dtype.tz is not None:
+        if pa.types.is_timestamp(pa_dtype) and pa_dtype.tz is not None:
             _require_timezone_database(request)
 
         pa_array = data._pa_array.cast(pa.string())
diff --git a/pandas/tests/indexes/multi/test_get_set.py b/pandas/tests/indexes/multi/test_get_set.py
@@ -1,8 +1,6 @@
 import numpy as np
 import pytest
 
-from pandas.compat import PY311
-
 from pandas.core.dtypes.dtypes import DatetimeTZDtype
 
 import pandas as pd
@@ -150,11 +148,7 @@ def test_set_levels_codes_directly(idx):
     with pytest.raises(AttributeError, match=msg):
         idx.levels = new_levels
 
-    msg = (
-        "property 'codes' of 'MultiIndex' object has no setter"
-        if PY311
-        else "can't set attribute"
-    )
+    msg = "property 'codes' of 'MultiIndex' object has no setter"
     with pytest.raises(AttributeError, match=msg):
         idx.codes = new_codes
 
diff --git a/pandas/tests/indexes/period/test_freq_attr.py b/pandas/tests/indexes/period/test_freq_attr.py
@@ -1,7 +1,5 @@
 import pytest
 
-from pandas.compat import PY311
-
 from pandas import (
     offsets,
     period_range,
@@ -19,10 +17,6 @@ def test_freq_setter_deprecated(self):
             idx.freq
 
         # warning for setter
-        msg = (
-            "property 'freq' of 'PeriodArray' object has no setter"
-            if PY311
-            else "can't set attribute"
-        )
+        msg = "property 'freq' of 'PeriodArray' object has no setter"
         with pytest.raises(AttributeError, match=msg):
             idx.freq = offsets.Day()
diff --git a/pandas/tests/io/parser/common/test_read_errors.py b/pandas/tests/io/parser/common/test_read_errors.py
@@ -12,7 +12,6 @@
 import numpy as np
 import pytest
 
-from pandas.compat import PY311
 from pandas.errors import (
     EmptyDataError,
     ParserError,
@@ -227,12 +226,10 @@ def test_null_byte_char(request, all_parsers):
     names = ["a", "b"]
     parser = all_parsers
 
-    if parser.engine == "c" or (parser.engine == "python" and PY311):
-        if parser.engine == "python" and PY311:
+    if parser.engine in ["c", "python"]:
+        if parser.engine == "python":
             request.applymarker(
-                pytest.mark.xfail(
-                    reason="In Python 3.11, this is read as an empty character not null"
-                )
+                pytest.mark.xfail(reason="This is read as an empty character not null")
             )
         expected = DataFrame([[np.nan, "foo"]], columns=names)
         out = parser.read_csv(StringIO(data), names=names)
diff --git a/pandas/tests/io/parser/test_quoting.py b/pandas/tests/io/parser/test_quoting.py
@@ -8,7 +8,6 @@
 
 import pytest
 
-from pandas.compat import PY311
 from pandas.errors import ParserError
 
 from pandas import DataFrame
@@ -90,14 +89,14 @@ def test_null_quote_char(all_parsers, quoting, quote_char):
         # Sanity checking.
         msg = (
             '"quotechar" must be a 1-character string'
-            if PY311 and all_parsers.engine == "python" and quote_char == ""
+            if all_parsers.engine == "python" and quote_char == ""
             else "quotechar must be set if quoting enabled"
         )
 
         with pytest.raises(TypeError, match=msg):
             parser.read_csv(StringIO(data), **kwargs)
-    elif not (PY311 and all_parsers.engine == "python"):
-        # Python 3.11+ doesn't support null/blank quote chars in their csv parsers
+    elif all_parsers.engine != "python":
+        # Python doesn't support null/blank quote chars in their csv parsers
         expected = DataFrame([[1, 2, 3]], columns=["a", "b", "c"])
         result = parser.read_csv(StringIO(data), **kwargs)
         tm.assert_frame_equal(result, expected)
diff --git a/pandas/tests/io/pytables/test_file_handling.py b/pandas/tests/io/pytables/test_file_handling.py
@@ -4,8 +4,6 @@
 import pytest
 
 from pandas.compat import (
-    PY311,
-    is_ci_environment,
     is_platform_linux,
     is_platform_little_endian,
     is_platform_mac,
@@ -279,18 +277,10 @@ def test_complibs_default_settings_override(tmp_path, setup_path):
 @pytest.mark.parametrize("lvl", range(10))
 @pytest.mark.parametrize("lib", tables.filters.all_complibs)
 @pytest.mark.filterwarnings("ignore:object name is not a valid")
-@pytest.mark.skipif(
-    not PY311 and is_ci_environment() and is_platform_linux(),
-    reason="Segfaulting in a CI environment",
-    # with xfail, would sometimes raise UnicodeDecodeError
-    # invalid state byte
-)
 def test_complibs(tmp_path, lvl, lib, request):
     # GH14478
-    if PY311 and is_platform_linux() and lib == "blosc2" and lvl != 0:
-        request.applymarker(
-            pytest.mark.xfail(reason=f"Fails for {lib} on Linux and PY > 3.11")
-        )
+    if is_platform_linux() and lib == "blosc2" and lvl != 0:
+        request.applymarker(pytest.mark.xfail(reason=f"Fails for {lib} on Linux"))
     df = DataFrame(
         np.ones((30, 4)), columns=list("ABCD"), index=np.arange(30).astype(np.str_)
     )
diff --git a/pandas/tests/tools/test_to_time.py b/pandas/tests/tools/test_to_time.py
@@ -4,8 +4,6 @@
 import numpy as np
 import pytest
 
-from pandas.compat import PY311
-
 from pandas import Series
 import pandas._testing as tm
 from pandas.core.tools.times import to_time
@@ -40,10 +38,6 @@ def test_parsers_time(self, time_string):
 
     def test_odd_format(self):
         new_string = "14.15"
-        msg = r"Cannot convert arg \['14\.15'\] to a time"
-        if not PY311:
-            with pytest.raises(ValueError, match=msg):
-                to_time(new_string)
         assert to_time(new_string, format="%H.%M") == time(14, 15)
 
     def test_arraylike(self):
diff --git a/scripts/generate_pip_deps_from_conda.py b/scripts/generate_pip_deps_from_conda.py
@@ -16,11 +16,8 @@
 import pathlib
 import re
 import sys
+import tomllib
 
-if sys.version_info >= (3, 11):
-    import tomllib
-else:
-    import tomli as tomllib
 import yaml
 
 EXCLUDE = {"python", "c-compiler", "cxx-compiler"}
diff --git a/scripts/tests/test_validate_min_versions_in_sync.py b/scripts/tests/test_validate_min_versions_in_sync.py
@@ -1,14 +1,9 @@
 import pathlib
-import sys
+import tomllib
 
 import pytest
 import yaml
 
-if sys.version_info >= (3, 11):
-    import tomllib
-else:
-    import tomli as tomllib
-
 from scripts.validate_min_versions_in_sync import (
     get_toml_map_from,
     get_yaml_map_from,
diff --git a/scripts/validate_min_versions_in_sync.py b/scripts/validate_min_versions_in_sync.py
@@ -16,16 +16,11 @@
 
 import pathlib
 import sys
+import tomllib
+from typing import Any
 
 import yaml
 
-if sys.version_info >= (3, 11):
-    import tomllib
-else:
-    import tomli as tomllib
-
-from typing import Any
-
 from scripts.generate_pip_deps_from_conda import CONDA_TO_PIP
 
 DOC_PATH = pathlib.Path("doc/source/getting_started/install.rst").resolve()
