Bump min support Python to 3.10

.github/workflows/benchmark.yml

@@ -15,7 +15,7 @@ jobs:
     - uses: actions/checkout@v4
     - uses: actions/setup-python@v5
       with:
-        python-version: "3.11"
+        python-version: "3.12"
     - name: Install dependencies
       run: |
         pip install -e .[dev] -c etc/requirements_dev.txt

.github/workflows/main.yml

@@ -16,9 +16,9 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-latest, windows-latest, macos-latest]
-        python-version: ["3.9", "3.12"]
+        python-version: ["3.10", "3.12"]
         include:
-          - python-version: "3.9"
+          - python-version: "3.10"
             requirements_file: requirements_dev.txt
           - python-version: "3.12"
             requirements_file: requirements_minpandas.txt

.github/workflows/release.yml

@@ -9,10 +9,10 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v4
-    - name: Set up Python 3.11
+    - name: Set up Python 3.12
       uses: actions/setup-python@v5
       with:
-        python-version: "3.11"
+        python-version: "3.12"
 
     - name: Install build dependencies
       run: |

etc/factory_bounds.py

@@ -9,8 +9,6 @@
 Module retained in case might be useful.
 """
 
-from __future__ import annotations
-
 import abc
 import dataclasses
 import pathlib

etc/requirements.txt

@@ -1,12 +1,12 @@
 #
-# This file is autogenerated by pip-compile with Python 3.9
+# This file is autogenerated by pip-compile with Python 3.10
 # by the following command:
 #
 #    pip-compile --output-file=etc/requirements.txt pyproject.toml
 #
 korean-lunar-calendar==0.3.1
     # via exchange_calendars (pyproject.toml)
-numpy==2.0.2
+numpy==2.1.1
     # via
     #   exchange_calendars (pyproject.toml)
     #   pandas

etc/requirements_dev.txt

@@ -1,5 +1,5 @@
 #
-# This file is autogenerated by pip-compile with Python 3.9
+# This file is autogenerated by pip-compile with Python 3.10
 # by the following command:
 #
 #    pip-compile --extra=dev --output-file=etc/requirements_dev.txt pyproject.toml
@@ -25,15 +25,13 @@ flake8==7.1.1
     # via exchange_calendars (pyproject.toml)
 hypothesis==6.112.1
     # via exchange_calendars (pyproject.toml)
-importlib-metadata==8.5.0
-    # via build
 iniconfig==2.0.0
     # via pytest
 korean-lunar-calendar==0.3.1
     # via exchange_calendars (pyproject.toml)
 mccabe==0.7.0
     # via flake8
-numpy==2.0.2
+numpy==2.1.1
     # via
     #   exchange_calendars (pyproject.toml)
     #   pandas
@@ -89,8 +87,6 @@ tzdata==2024.1
     #   pandas
 wheel==0.44.0
     # via pip-tools
-zipp==3.20.2
-    # via importlib-metadata
 
 # The following packages are considered to be unsafe in a requirements file:
 # pip

etc/requirements_minpandas.txt

@@ -1,5 +1,5 @@
 #
-# This file is autogenerated by pip-compile with Python 3.9
+# This file is autogenerated by pip-compile with Python 3.10
 # by the following command:
 #
 #    pip-compile --extra=dev --output-file=etc/requirements_minpandas.txt pyproject.toml
@@ -29,8 +29,6 @@ flake8==7.1.1
     # via exchange_calendars (pyproject.toml)
 hypothesis==6.112.1
     # via exchange_calendars (pyproject.toml)
-importlib-metadata==8.5.0
-    # via build
 iniconfig==2.0.0
     # via pytest
 korean-lunar-calendar==0.3.1
@@ -91,8 +89,6 @@ tzdata==2024.1
     # via exchange_calendars (pyproject.toml)
 wheel==0.44.0
     # via pip-tools
-zipp==3.20.2
-    # via importlib-metadata
 
 # The following packages are considered to be unsafe in a requirements file:
 # pip

exchange_calendars/calendar_helpers.py

@@ -2,16 +2,15 @@
 
 import contextlib
 import datetime
-import typing
-from typing import Literal
+from typing import Literal, TYPE_CHECKING
 from zoneinfo import ZoneInfo
 
 import numpy as np
 import pandas as pd
 
 from exchange_calendars import errors
 
-if typing.TYPE_CHECKING:
+if TYPE_CHECKING:
     from exchange_calendars import ExchangeCalendar
 
 UTC = ZoneInfo("UTC")
@@ -22,15 +21,15 @@
 
 # Use Date type where input does not need to represent an actual session
 # and will be parsed by parse_date.
-Date = typing.Union[pd.Timestamp, str, int, float, datetime.datetime]
+Date = pd.Timestamp | str | int | float | datetime.datetime
 
 # Use Session type where input should represent an actual session and will
 # be parsed by parse_session.
 Session = Date
 
 # Use Minute type where input does not need to represent an actual trading
 # minute and will be parsed by parse_timestamp.
-Minute = typing.Union[pd.Timestamp, str, int, float, datetime.datetime]
+Minute = pd.Timestamp | str | int | float | datetime.datetime
 
 # Use TradingMinute where input should represent a trading minute and will
 # be parsed by parse_trading_minute.

exchange_calendars/calendar_utils.py

@@ -1,5 +1,3 @@
-from __future__ import annotations
-
 from typing import Literal
 
 from .calendar_helpers import parse_date, Date

exchange_calendars/errors.py

@@ -12,7 +12,9 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
+
 from __future__ import annotations
+
 import typing
 import pandas as pd
 

exchange_calendars/exchange_calendar_xbud.py

@@ -13,7 +13,6 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-from __future__ import annotations
 
 import datetime
 from zoneinfo import ZoneInfo

exchange_calendars/exchange_calendar_xbue.py

@@ -13,7 +13,6 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-from __future__ import annotations
 
 import datetime
 from itertools import chain

exchange_calendars/exchange_calendar_xkrx.py

@@ -12,7 +12,7 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
-from __future__ import annotations
+
 
 from datetime import time
 import functools

exchange_calendars/exchange_calendar_xmos.py

@@ -13,7 +13,6 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-from __future__ import annotations
 
 import datetime
 from itertools import chain

exchange_calendars/exchange_calendar_xphs.py

@@ -13,7 +13,6 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-from __future__ import annotations
 
 import datetime
 from itertools import chain

exchange_calendars/exchange_calendar_xsgo.py

@@ -13,7 +13,6 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-from __future__ import annotations
 
 import datetime
 from zoneinfo import ZoneInfo

exchange_calendars/exchange_calendar_xtai.py

@@ -13,7 +13,6 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-from __future__ import annotations
 
 import datetime
 from itertools import chain

exchange_calendars/exchange_calendar_xwar.py

@@ -13,7 +13,6 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-from __future__ import annotations
 
 import datetime
 from zoneinfo import ZoneInfo

exchange_calendars/precomputed_exchange_calendar.py

@@ -1,4 +1,3 @@
-from __future__ import annotations
 from abc import abstractmethod
 
 import numpy as np

exchange_calendars/utils/pandas_utils.py

@@ -1,5 +1,3 @@
-from __future__ import annotations
-
 import datetime
 from zoneinfo import ZoneInfo
 

exchange_calendars/xbkk_holidays.py

@@ -1,5 +1,3 @@
-from __future__ import annotations
-
 import datetime
 
 import pandas as pd

pyproject.toml

@@ -12,12 +12,11 @@ authors = [
 readme = "README.md"
 license = {file = "LICENSE"}
 keywords = ["finance", "security", "calendar", "exchange"]
-requires-python = "~=3.9"
+requires-python = "~=3.10"
 classifiers = [
 	"Development Status :: 4 - Beta",
     "Programming Language :: Python",
     "Programming Language :: Python :: 3",
-    "Programming Language :: Python :: 3.9",
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
     "Programming Language :: Python :: 3.12",
@@ -64,4 +63,4 @@ write_to = "exchange_calendars/_version.py"
 
 [tool.black]
 line-length = 88
-target-version = ['py39', 'py310', 'py311', 'py312']
+target-version = ['py310', 'py311', 'py312']

tests/test_calendar_helpers.py

@@ -1,7 +1,5 @@
 """Tests for calendar_helpers module."""
 
-from __future__ import annotations
-
 from collections import abc
 import datetime
 from datetime import time

tests/test_exchange_calendar.py

@@ -9,7 +9,6 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
-from __future__ import annotations
 
 from collections import abc
 from datetime import time
@@ -722,7 +721,7 @@ def _get_sessions_with_times_different_to_next_session(
 
         Returns
         -------
-        list of pd.Datetimeindex
+        list of pd.DatetimeIndex
             [0] sessions with earlier next session
             [1] sessions with later next session
         """
@@ -1117,12 +1116,12 @@ def non_sessions(self) -> pd.DatetimeIndex:
     @property
     def sessions_range_defined_by_non_sessions(
         self,
-    ) -> tuple[tuple[pd.Timestamp, pd.Timestamp], pd.Datetimeindex] | None:
+    ) -> tuple[tuple[pd.Timestamp, pd.Timestamp], pd.DatetimeIndex] | None:
         """Range containing sessions although defined with non-sessions.
 
         Returns
         -------
-        tuple[tuple[pd.Timestamp, pd.Timestamp], pd.Datetimeindex]:
+        tuple[tuple[pd.Timestamp, pd.Timestamp], pd.DatetimeIndex]:
             [0] tuple[pd.Timestamp, pd.Timestamp]:
                 [0] range start as non-session date.
                 [1] range end as non-session date.
@@ -1869,7 +1868,7 @@ def early_closes_sample_time(self) -> abc.Iterator[pd.Timedelta | None]:
         yield None
 
     @pytest.fixture
-    def early_closes_weekdays(self) -> abc.Iterator[tuple(int)]:
+    def early_closes_weekdays(self) -> abc.Iterator[tuple[int]]:
         """Weekdays with non-standard close times.
 
         `test_early_closes_weekdays` will check that all sessions on these