Dropped support for Python 3.8 (#73)

.github/workflows/ci.yaml

@@ -26,12 +26,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-latest, windows-latest, macos-latest]
-        python-version: ["3.8", "3.9", "3.10", "3.11", "3.12"]
-        exclude:
-          - os: macos-latest
-            python-version: "3.8"
-          - os: windows-latest
-            python-version: "3.8"
+        python-version: ["3.9", "3.10", "3.11", "3.12"]
     runs-on: ${{ matrix.os }}
     steps:
       - uses: actions/checkout@v4
@@ -91,7 +86,7 @@ jobs:
           args: >
             -Dsonar.organization=fschuch
             -Dsonar.projectKey=fschuch_xcompact3d_toolbox
-            -Dsonar.python.version=3.8,3.9,3.10,3.11,3.12
+            -Dsonar.python.version=3.9,3.10,3.11,3.12
             -Dsonar.sources=xcompact3d_toolbox
             -Dsonar.tests=tests
             -Dsonar.python.coverage.reportPaths=coverage.*.xml

pyproject.toml

@@ -6,7 +6,7 @@ build-backend = "hatchling.build"
 name = "xcompact3d_toolbox"
 description = "A set of tools for pre and postprocessing prepared for the high-order Navier-Stokes solver XCompact3d"
 readme = "README.md"
-requires-python = ">=3.8"
+requires-python = ">=3.9"
 authors = [{ name = "Felipe N. Schuch", email = "[email protected]" }]
 classifiers = [
     "Development Status :: 5 - Production/Stable",
@@ -15,7 +15,6 @@ classifiers = [
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
     "Programming Language :: Python :: 3.12",
-    "Programming Language :: Python :: 3.8",
     "Programming Language :: Python :: 3.9",
     "Programming Language :: Python",
     "Topic :: Scientific/Engineering",
@@ -146,7 +145,7 @@ extra-dependencies = ["pytest-randomly", "pytest-rerunfailures", "pytest-xdist"]
 extended = "test -n auto --reruns 7 --reruns-delay 1 {args}"
 
 [[tool.hatch.envs.test.matrix]]
-python = ["3.8", "3.9", "3.10", "3.11", "3.12"]
+python = ["3.9", "3.10", "3.11", "3.12"]
 
 [tool.hatch.envs.docs]
 description = "Documentation environment"

xcompact3d_toolbox/io.py

@@ -7,7 +7,10 @@
 import os
 import os.path
 import warnings
-from typing import Iterator
+from typing import TYPE_CHECKING
+
+if TYPE_CHECKING:
+    from collections.abc import Iterator
 
 import numpy as np
 import pandas as pd