Drop python 3.8, test python 3.11 (#209)

* Drop py38

* bump to py 3.11

* more bump

* [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

* revert bump for xarray tests

---------

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

.github/workflows/ci-additional.yaml

@@ -41,7 +41,7 @@ jobs:
 
     env:
       CONDA_ENV_FILE: ci/environment.yml
-      PYTHON_VERSION: "3.10"
+      PYTHON_VERSION: "3.11"
 
     steps:
       - uses: actions/checkout@v4
@@ -92,7 +92,7 @@ jobs:
         shell: bash -l {0}
     env:
       CONDA_ENV_FILE: ci/environment.yml
-      PYTHON_VERSION: "3.10"
+      PYTHON_VERSION: "3.11"
 
     steps:
       - uses: actions/checkout@v4

.github/workflows/ci.yaml

@@ -25,7 +25,7 @@ jobs:
       fail-fast: false
       matrix:
         os: ["ubuntu-latest", "windows-latest"]
-        python-version: ["3.8", "3.10"]
+        python-version: ["3.9", "3.11"]
     steps:
       - uses: actions/checkout@v4
         with:

.github/workflows/testpypi-release.yaml

@@ -24,7 +24,7 @@ jobs:
       - uses: actions/setup-python@v4
         name: Install Python
         with:
-          python-version: "3.10"
+          python-version: "3.11"
 
       - name: Install dependencies
         run: |
@@ -65,7 +65,7 @@ jobs:
       - uses: actions/setup-python@v4
         name: Install Python
         with:
-          python-version: "3.10"
+          python-version: "3.11"
       - uses: actions/download-artifact@v3
         with:
           name: releases

.github/workflows/upstream-dev-ci.yaml

@@ -26,7 +26,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["3.10"]
+        python-version: ["3.11"]
     steps:
       - uses: actions/checkout@v4
         with:

flox/core.py

@@ -7,16 +7,14 @@
 import sys
 import warnings
 from collections import namedtuple
+from collections.abc import Mapping, Sequence
 from functools import partial, reduce
 from numbers import Integral
 from typing import (
     TYPE_CHECKING,
     Any,
     Callable,
-    Dict,
     Literal,
-    Mapping,
-    Sequence,
     Union,
     overload,
 )
@@ -74,8 +72,8 @@
     T_IsBins = Union[bool | Sequence[bool]]
 
 
-IntermediateDict = Dict[Union[str, Callable], Any]
-FinalResultsDict = Dict[str, Union["DaskArray", np.ndarray]]
+IntermediateDict = dict[Union[str, Callable], Any]
+FinalResultsDict = dict[str, Union["DaskArray", np.ndarray]]
 FactorProps = namedtuple("FactorProps", "offset_group nan_sentinel nanmask")
 
 # This dummy axis is inserted using np.expand_dims

flox/xarray.py

@@ -1,6 +1,7 @@
 from __future__ import annotations
 
-from typing import TYPE_CHECKING, Any, Hashable, Iterable, Sequence, Union
+from collections.abc import Hashable, Iterable, Sequence
+from typing import TYPE_CHECKING, Any, Union
 
 import numpy as np
 import pandas as pd

flox/xrutils.py

@@ -2,7 +2,8 @@
 # defined in xarray
 
 import datetime
-from typing import Any, Iterable
+from collections.abc import Iterable
+from typing import Any
 
 import numpy as np
 import pandas as pd

pyproject.toml

@@ -3,15 +3,14 @@ name = "flox"
 description = "GroupBy operations for dask.array"
 license = {file = "LICENSE"}
 readme = "README.md"
-requires-python = ">=3.8"
+requires-python = ">=3.9"
 keywords = ["xarray", "dask", "groupby"]
 classifiers = [
     "Development Status :: 4 - Beta",
     "License :: OSI Approved :: Apache Software License",
     "Natural Language :: English",
     "Operating System :: OS Independent",
     "Programming Language :: Python",
-    "Programming Language :: Python :: 3.8",
     "Programming Language :: Python :: 3.9",
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
@@ -60,10 +59,10 @@ write_to_template= '__version__ = "{version}"'
 
 [tool.black]
 line-length = 100
-target-version = ["py38"]
+target-version = ["py39"]
 
 [tool.ruff]
-target-version = "py38"
+target-version = "py39"
 builtins = ["ellipsis"]
 exclude = [
     ".eggs",