Raised minimal python version to 3.9

.github/workflows/release_pip.yml

@@ -17,7 +17,7 @@ jobs:
     - name: Set up Python
       uses: actions/setup-python@v4
       with:
-        python-version: '3.8'
+        python-version: '3.9'
 
     - name: Install dependencies
       run: |

.github/workflows/tests_minversion.yml

@@ -15,7 +15,7 @@ jobs:
     - name: Set up Python
       uses: actions/setup-python@v4
       with:
-        python-version: '3.8'
+        python-version: '3.9'
 
     - name: Install dependencies
       # install packages in the exact version given in requirements.txt

.github/workflows/tests_types.yml

@@ -7,7 +7,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        pyversion: ['3.8', '3.12']
+        pyversion: ['3.9', '3.12']
     timeout-minutes: 30
 
     steps:

pde/fields/base.py

@@ -155,7 +155,7 @@ def _data_flat(self) -> np.ndarray:
         # flatten the first dimension of the internal data by creating a view and then
         # setting the new shape. This disallows accidental copying of the data
         data_flat = self._data_full.view()
-        data_flat.shape = (-1, *self.grid._shape_full)  # type: ignore
+        data_flat.shape = (-1, *self.grid._shape_full)
         return data_flat
 
     @_data_flat.setter

pde/fields/collection.py

@@ -9,7 +9,8 @@
 import json
 import logging
 import warnings
-from typing import Any, Callable, Iterator, Literal, Mapping, Sequence, overload
+from collections.abc import Iterator, Mapping, Sequence
+from typing import Any, Callable, Literal, overload
 
 import numpy as np
 from matplotlib import cm
@@ -21,7 +22,6 @@
 except ImportError:
     from matplotlib.cm import get_cmap
 
-
 from ..grids.base import GridBase
 from ..tools.docstrings import fill_in_docstring
 from ..tools.misc import Number, number_array

pde/fields/scalar.py

@@ -7,8 +7,9 @@
 from __future__ import annotations
 
 import numbers
+from collections.abc import Sequence
 from pathlib import Path
-from typing import TYPE_CHECKING, Callable, Literal, Sequence
+from typing import TYPE_CHECKING, Callable, Literal
 
 import numpy as np
 from numpy.typing import DTypeLike

pde/fields/tensorial.py

@@ -6,7 +6,8 @@
 
 from __future__ import annotations
 
-from typing import TYPE_CHECKING, Callable, Sequence
+from collections.abc import Sequence
+from typing import TYPE_CHECKING, Callable
 
 import numpy as np
 from numpy.typing import DTypeLike

pde/fields/vectorial.py

@@ -6,7 +6,8 @@
 
 from __future__ import annotations
 
-from typing import TYPE_CHECKING, Any, Callable, Literal, Sequence
+from collections.abc import Sequence
+from typing import TYPE_CHECKING, Any, Callable, Literal
 
 import numba as nb
 import numpy as np

pde/grids/_mesh.py

@@ -7,8 +7,9 @@
 from __future__ import annotations
 
 import math
+from collections.abc import Sequence
 from enum import IntEnum
-from typing import Any, Sequence, TypeVar
+from typing import Any, TypeVar
 
 import numpy as np
 

pde/grids/base.py

@@ -14,17 +14,8 @@
 import math
 import warnings
 from abc import ABCMeta, abstractmethod
-from typing import (
-    TYPE_CHECKING,
-    Any,
-    Callable,
-    Generator,
-    Iterator,
-    Literal,
-    NamedTuple,
-    Sequence,
-    overload,
-)
+from collections.abc import Generator, Iterator, Sequence
+from typing import TYPE_CHECKING, Any, Callable, Literal, NamedTuple, overload
 
 import numba as nb
 import numpy as np

pde/grids/boundaries/axes.py

@@ -8,7 +8,8 @@
 
 from __future__ import annotations
 
-from typing import Sequence, Union
+from collections.abc import Sequence
+from typing import Union
 
 import numpy as np
 from numba.extending import register_jitable

pde/grids/boundaries/axis.py

@@ -11,7 +11,7 @@
 
 from __future__ import annotations
 
-from typing import TYPE_CHECKING, Dict, Tuple, Union
+from typing import TYPE_CHECKING, Union
 
 import numpy as np
 from numba.extending import register_jitable
@@ -24,9 +24,9 @@
     from .._mesh import GridMesh
 
 BoundaryPairData = Union[
-    Dict[str, BoundaryData],
+    dict[str, BoundaryData],
     BoundaryData,
-    Tuple[BoundaryData, BoundaryData],
+    tuple[BoundaryData, BoundaryData],
     "BoundaryAxisBase",
 ]
 

pde/grids/boundaries/local.py

@@ -65,7 +65,7 @@
 import warnings
 from abc import ABCMeta, abstractmethod
 from numbers import Number
-from typing import TYPE_CHECKING, Any, Callable, Dict, Literal, Tuple, TypeVar, Union
+from typing import TYPE_CHECKING, Any, Callable, Literal, TypeVar, Union
 
 import numba as nb
 import numpy as np
@@ -86,7 +86,7 @@
     from .._mesh import GridMesh
 
 
-BoundaryData = Union[Dict, str, "BCBase"]
+BoundaryData = Union[dict, str, "BCBase"]
 
 
 class BCDataError(ValueError):
@@ -166,7 +166,7 @@ def _make_get_arr_1d(
         Consequently, `i = idx[axis]` and `arr[..., idx] == arr_1d[..., i]`.
     """
     assert 0 <= axis < dim
-    ResultType = Tuple[np.ndarray, int, Tuple]
+    ResultType = tuple[np.ndarray, int, tuple]
 
     # extract the correct indices
     if dim == 1:

pde/grids/cartesian.py

@@ -7,7 +7,8 @@
 from __future__ import annotations
 
 import itertools
-from typing import TYPE_CHECKING, Any, Generator, Sequence
+from collections.abc import Generator, Sequence
+from typing import TYPE_CHECKING, Any
 
 import numpy as np
 

pde/grids/cylindrical.py

@@ -6,7 +6,8 @@
 
 from __future__ import annotations
 
-from typing import TYPE_CHECKING, Any, Generator, Literal, Sequence
+from collections.abc import Generator, Sequence
+from typing import TYPE_CHECKING, Any, Literal
 
 import numpy as np
 

pde/solvers/__init__.py

@@ -30,7 +30,7 @@
     ExplicitMPISolver = None  # type: ignore
 
 
-def registered_solvers() -> List[str]:
+def registered_solvers() -> list[str]:
     """returns all solvers that are currently registered
 
     Returns:

pde/solvers/controller.py

@@ -9,7 +9,7 @@
 import datetime
 import logging
 import time
-from typing import TYPE_CHECKING, Any, Callable, Tuple, TypeVar, Union
+from typing import TYPE_CHECKING, Any, Callable, TypeVar, Union
 
 from .. import __version__
 from ..tools import mpi
@@ -25,7 +25,7 @@
     from ..fields.base import FieldBase
 
 
-TRangeType = Union[float, Tuple[float, float]]
+TRangeType = Union[float, tuple[float, float]]
 TState = TypeVar("TState", bound="FieldBase")
 
 

pde/storage/base.py

@@ -8,8 +8,9 @@
 
 import logging
 from abc import ABCMeta, abstractmethod
+from collections.abc import Iterator, Sequence
 from inspect import signature
-from typing import TYPE_CHECKING, Any, Callable, Iterator, Literal, Sequence
+from typing import TYPE_CHECKING, Any, Callable, Literal
 
 import numpy as np
 from numpy.typing import DTypeLike

pde/storage/memory.py

@@ -6,8 +6,8 @@
 
 from __future__ import annotations
 
+from collections.abc import Sequence
 from contextlib import contextmanager
-from typing import Sequence
 
 import numpy as np
 

pde/tools/cache.py

@@ -22,8 +22,9 @@
 import functools
 import logging
 import numbers
+from collections.abc import Iterable
 from hashlib import sha1
-from typing import Callable, Iterable, Literal, TypeVar
+from typing import Callable, Literal, TypeVar
 
 import numpy as np
 from scipy import sparse

pde/tools/expressions.py

@@ -25,7 +25,8 @@
 import numbers
 import re
 from abc import ABCMeta, abstractmethod
-from typing import Any, Callable, Mapping, Sequence, Union
+from collections.abc import Mapping, Sequence
+from typing import Any, Callable, Union
 
 import numpy as np
 import sympy

pde/tools/misc.py

@@ -29,8 +29,9 @@
 import os
 import unittest
 import warnings
+from collections.abc import Sequence
 from pathlib import Path
-from typing import Any, Callable, Sequence, TypeVar
+from typing import Any, Callable, TypeVar
 
 import numpy as np
 from numpy.typing import DTypeLike

pde/tools/parameters.py

@@ -19,7 +19,8 @@
 
 import logging
 import warnings
-from typing import Any, Sequence, Union
+from collections.abc import Sequence
+from typing import Any, Union
 
 import numpy as np
 

pde/tools/plotting.py

@@ -24,7 +24,8 @@
 import logging
 import sys
 import warnings
-from typing import TYPE_CHECKING, Any, Generator, Literal
+from collections.abc import Generator
+from typing import TYPE_CHECKING, Any, Literal
 
 from ..tools.docstrings import replace_in_docstring
 

pde/tools/spectral.py

@@ -9,7 +9,9 @@
 .. codeauthor:: David Zwicker <[email protected]>
 """
 
-from typing import Callable, Optional, Tuple
+from __future__ import annotations
+
+from typing import Callable, Optional
 
 import numpy as np
 
@@ -22,11 +24,11 @@
 
 
 def make_colored_noise(
-    shape: Tuple[int, ...],
+    shape: tuple[int, ...],
     dx=1.0,
     exponent: float = 0,
     scale: float = 1,
-    rng: Optional[np.random.Generator] = None,
+    rng: np.random.Generator | None = None,
 ) -> Callable[[], np.ndarray]:
     r"""Return a function creating an array of random values that obey
 

pde/trackers/base.py

@@ -10,7 +10,8 @@
 import math
 import warnings
 from abc import ABCMeta, abstractmethod
-from typing import Any, Dict, Optional, Sequence, Union
+from collections.abc import Sequence
+from typing import Any, Optional, Union
 
 import numpy as np
 
@@ -19,7 +20,7 @@
 from ..tools.misc import module_available
 from .interrupts import InterruptData, parse_interrupt
 
-InfoDict = Optional[Dict[str, Any]]
+InfoDict = Optional[dict[str, Any]]
 TrackerDataType = Union["TrackerBase", str]
 
 

pde/trackers/interrupts.py

@@ -20,13 +20,14 @@
 import math
 import time
 from abc import ABCMeta, abstractmethod
-from typing import Any, Dict, Optional, Sequence, TypeVar, Union
+from collections.abc import Sequence
+from typing import Any, Optional, TypeVar, Union
 
 import numpy as np
 
 from ..tools.parse_duration import parse_duration
 
-InfoDict = Optional[Dict[str, Any]]
+InfoDict = Optional[dict[str, Any]]
 TInterrupt = TypeVar("TInterrupt", bound="InterruptsBase")
 
 

pde/visualization/plotting.py

@@ -38,7 +38,7 @@
 )
 
 _logger = logging.getLogger(__name__)
-ScaleData = Union[str, float, Tuple[float, float]]
+ScaleData = Union[str, float, tuple[float, float]]
 
 
 def _add_horizontal_colorbar(im, ax, num_loc: int = 5) -> None:

pyproject.toml

@@ -9,7 +9,7 @@ authors = [
 ]
 license = {text = "MIT"}
 readme = "README.md"
-requires-python = ">=3.8,<3.13"
+requires-python = ">=3.9,<3.13"
 dynamic = ["version"]
 
 keywords = ["pdes", "partial-differential-equations", "dynamical-systems"]
@@ -20,7 +20,6 @@ classifiers = [
     "Topic :: Scientific/Engineering",
     "License :: OSI Approved :: MIT License",
     "Programming Language :: Python :: 3",
-    "Programming Language :: Python :: 3.8",
     "Programming Language :: Python :: 3.9",
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
@@ -60,7 +59,7 @@ namespaces = false
 write_to = "pde/_version.py"
 
 [tool.black]
-target_version = ["py38"]
+target_version = ["py39"]
 exclude = "scripts/templates"
 
 [tool.isort]
@@ -78,7 +77,7 @@ filterwarnings = [
 ]
 
 [tool.mypy]
-python_version = "3.8"
+python_version = "3.9"
 plugins = "numpy.typing.mypy_plugin"
 warn_return_any = true
 warn_unused_configs = true