Merge pull request #884 from MilesCranmer/compat-3.8

Compat with older Python

Author: MilesCranmer

.github/workflows/CI.yml

@@ -41,6 +41,10 @@ jobs:
             python-version: '3.12'
             os: ubuntu-latest
             test-id: include
+          - julia-version: '1'
+            python-version: '3.8'
+            os: ubuntu-latest
+            test-id: include
 
     steps:
       - uses: actions/checkout@v4

pyproject.toml

@@ -11,7 +11,7 @@ authors = [
 description = "Simple and efficient symbolic regression"
 readme = {file = "README.md", content-type = "text/markdown"}
 license = {file = "LICENSE"}
-requires-python = ">=3.10"
+requires-python = ">=3.8"
 classifiers = [
     "Programming Language :: Python :: 3",
     "Operating System :: OS Independent",
@@ -39,7 +39,7 @@ dev = [
     "mypy>=1,<2",
     "nbval>=0.11,<0.12",
     "pandas-stubs",
-    "pre-commit>=3.7,<5",
+    "pre-commit>=3.0,<5",
     "pytest-cov>=5,<7",
     "pytest>=8,<9",
     "tensorboard>=2,<3",

pysr/__init__.py

@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 import logging
 import os
 

pysr/denoising.py

@@ -1,5 +1,7 @@
 """Functions for denoising data during preprocessing."""
 
+from __future__ import annotations
+
 from typing import cast
 
 import numpy as np

pysr/export.py

@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 import copy
 from collections.abc import Callable
 

pysr/export_latex.py

@@ -1,5 +1,7 @@
 """Functions to help export PySR equations to LaTeX."""
 
+from __future__ import annotations
+
 import pandas as pd
 import sympy  # type: ignore
 from sympy.printing.latex import LatexPrinter  # type: ignore

pysr/export_numpy.py

@@ -1,5 +1,7 @@
 """Code for exporting discovered expressions to numpy"""
 
+from __future__ import annotations
+
 import warnings
 
 import numpy as np

pysr/export_sympy.py

@@ -1,5 +1,7 @@
 """Define utilities to export to sympy"""
 
+from __future__ import annotations
+
 from collections.abc import Callable
 
 import sympy  # type: ignore

pysr/expression_specs.py

@@ -1,7 +1,9 @@
+from __future__ import annotations
+
 import copy
 from abc import ABC, abstractmethod
 from textwrap import dedent
-from typing import TYPE_CHECKING, Any, NewType, TypeAlias, overload
+from typing import TYPE_CHECKING, Any, NewType, overload
 
 import numpy as np
 import pandas as pd
@@ -10,6 +12,11 @@
 from .julia_helpers import jl_array
 from .julia_import import AnyValue, SymbolicRegression, jl
 
+try:
+    from typing import TypeAlias
+except ImportError:
+    from typing_extensions import TypeAlias
+
 # For type checking purposes
 if TYPE_CHECKING:
     from .sr import PySRRegressor  # pragma: no cover

pysr/feature_selection.py

@@ -1,5 +1,7 @@
 """Functions for doing feature selection during preprocessing."""
 
+from __future__ import annotations
+
 import logging
 from typing import cast