CI: test on 3.12

.github/workflows/test.yml

@@ -18,7 +18,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-latest, windows-latest, macos-latest]
-        python-version: ['3.9', '3.10', '3.11']
+        python-version: ['3.9', '3.10', '3.11', '3.12']
 
     steps:
     - uses: actions/checkout@v3

pandas-stubs/_libs/tslibs/timestamps.pyi

@@ -6,6 +6,7 @@ from datetime import (
     timedelta,
     tzinfo as _tzinfo,
 )
+import sys
 from time import struct_time
 from typing import (
     ClassVar,
@@ -99,8 +100,16 @@ class Timestamp(datetime):
     def tz(self) -> _tzinfo | None: ...
     @property
     def fold(self) -> int: ...
-    @classmethod
-    def fromtimestamp(cls, t: float, tz: _tzinfo | str | None = ...) -> Self: ...
+
+    if sys.version_info < (3, 12):
+        @classmethod
+        def fromtimestamp(cls, t: float, tz: _tzinfo | str | None = ...) -> Self: ...
+    else:
+        @classmethod
+        def fromtimestamp(  # pyright: ignore[reportIncompatibleMethodOverride]
+            cls, t: float, tz: _tzinfo | str | None = ...
+        ) -> Self: ...
+
     @classmethod
     def utcfromtimestamp(cls, ts: float) -> Self: ...
     @classmethod

pyproject.toml

@@ -35,7 +35,7 @@ types-pytz = ">= 2022.1.1"
 numpy = { version = ">=1.26.0", python = "<3.13" }
 
 [tool.poetry.group.dev.dependencies]
-mypy = "1.7.1"
+mypy = "1.8.0"
 pandas = "2.1.4"
 pyarrow = ">=10.0.1"
 pytest = ">=7.1.2"
@@ -61,7 +61,6 @@ jinja2 = ">=3.1"
 scipy = { version = ">=1.9.1", python = "<3.13" }
 SQLAlchemy = ">=2.0.12"
 types-python-dateutil = ">=2.8.19"
-numexpr = "<2.8.5"  # https://github.com/pandas-dev/pandas/issues/54449
 beautifulsoup4 = ">=4.12.2"
 html5lib = ">=1.1"
 

tests/__init__.py

@@ -7,23 +7,29 @@
 )
 import os
 import platform
+import sys
 from typing import (
     TYPE_CHECKING,
     Final,
+    TypeVar,
 )
 
-import pandas as pd
-from pandas.util.version import Version
 import pytest
 
-from pandas._typing import T
+if sys.version_info < (3, 12):
+    import pandas as pd
+else:
+    with pytest.warns(DeprecationWarning, match="datetime.datetime.utcfromtimestamp"):
+        import pandas as pd
+from pandas.util.version import Version
 
+_T = TypeVar("_T")
 TYPE_CHECKING_INVALID_USAGE: Final = TYPE_CHECKING
 WINDOWS = os.name == "nt" or "cygwin" in platform.system().lower()
 PD_LTE_21 = Version(pd.__version__) < Version("2.1.999")
 
 
-def check(actual: T, klass: type, dtype: type | None = None, attr: str = "left") -> T:
+def check(actual: _T, klass: type, dtype: type | None = None, attr: str = "left") -> _T:
     if not isinstance(actual, klass):
         raise RuntimeError(f"Expected type '{klass}' but got '{type(actual)}'")
     if dtype is None:

tests/test_frame.py

@@ -14,6 +14,7 @@
 import io
 import itertools
 from pathlib import Path
+import platform
 import string
 from typing import (
     TYPE_CHECKING,
@@ -1821,24 +1822,30 @@ def test_frame_getitem_isin() -> None:
 def test_to_excel() -> None:
     df = pd.DataFrame(data={"col1": [1, 2], "col2": [3, 4]})
 
-    with ensure_clean() as path:
-        df.to_excel(path, engine="openpyxl")
-        check(assert_type(pd.read_excel(path), pd.DataFrame), pd.DataFrame)
-    with ensure_clean() as path:
-        df.to_excel(Path(path), engine="openpyxl")
-        check(assert_type(pd.read_excel(path), pd.DataFrame), pd.DataFrame)
-    with ensure_clean() as path:
-        df.to_excel(path, engine="openpyxl", startrow=1, startcol=1, header=False)
-        check(assert_type(pd.read_excel(path), pd.DataFrame), pd.DataFrame)
-    with ensure_clean() as path:
-        df.to_excel(path, engine="openpyxl", sheet_name="sheet", index=False)
-        check(assert_type(pd.read_excel(path), pd.DataFrame), pd.DataFrame)
-    with ensure_clean() as path:
-        df.to_excel(path, engine="openpyxl", header=["x", "y"])
-        check(assert_type(pd.read_excel(path), pd.DataFrame), pd.DataFrame)
-    with ensure_clean() as path:
-        df.to_excel(path, engine="openpyxl", columns=["col1"])
-        check(assert_type(pd.read_excel(path), pd.DataFrame), pd.DataFrame)
+    with pytest_warns_bounded(
+        DeprecationWarning,
+        match="datetime.datetime.utcnow",
+        lower="3.11.99",
+        version_str=platform.python_version(),
+    ):
+        with ensure_clean() as path:
+            df.to_excel(path, engine="openpyxl")
+            check(assert_type(pd.read_excel(path), pd.DataFrame), pd.DataFrame)
+        with ensure_clean() as path:
+            df.to_excel(Path(path), engine="openpyxl")
+            check(assert_type(pd.read_excel(path), pd.DataFrame), pd.DataFrame)
+        with ensure_clean() as path:
+            df.to_excel(path, engine="openpyxl", startrow=1, startcol=1, header=False)
+            check(assert_type(pd.read_excel(path), pd.DataFrame), pd.DataFrame)
+        with ensure_clean() as path:
+            df.to_excel(path, engine="openpyxl", sheet_name="sheet", index=False)
+            check(assert_type(pd.read_excel(path), pd.DataFrame), pd.DataFrame)
+        with ensure_clean() as path:
+            df.to_excel(path, engine="openpyxl", header=["x", "y"])
+            check(assert_type(pd.read_excel(path), pd.DataFrame), pd.DataFrame)
+        with ensure_clean() as path:
+            df.to_excel(path, engine="openpyxl", columns=["col1"])
+            check(assert_type(pd.read_excel(path), pd.DataFrame), pd.DataFrame)
 
 
 def test_join() -> None: