Drop support for Python 3.9; eliminate duplicate run of test-mindeps CI

.github/workflows/integration-test.yml

@@ -49,7 +49,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: ["3.9", "3.10", "3.11", "3.12", "3.13"]
+        python-version: ["3.10", "3.11", "3.12", "3.13"]
       fail-fast: false
 
     steps:

.github/workflows/test-mindeps.yml

@@ -2,6 +2,8 @@ name: Unit test minimum dependencies
 
 on:
   push:
+    branches:
+      - main
   pull_request:
   workflow_dispatch:
 
@@ -29,7 +31,7 @@ jobs:
       - name: Setup nox
         uses: wntrblm/nox@2024.10.09
         with:
-          python-versions: 3.9
+          python-versions: "3.10"
 
       - name: Test
         run: nox -s test-min-deps -- --verbose --cov=earthaccess --cov-report=term-missing --capture=no --tb=native --log-cli-level=INFO

.github/workflows/test.yml

@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: ["3.9", "3.10", "3.11", "3.12", "3.13"]
+        python-version: ["3.10", "3.11", "3.12", "3.13"]
       fail-fast: false
 
     steps:

CHANGELOG.md

@@ -28,6 +28,9 @@ and this project uses [Semantic Versioning](https://semver.org/spec/v2.0.0.html)
 
 - The `scripts/integration-test.sh` script has been removed in favor of the `integration-tests` nox session.
   ([#872](https://github.com/nsidc/earthaccess/issues/872)) ([@jhkennedy](https://github.com/jhkennedy))
+- Python 3.9 is no longer supported.
+  ([#876](https://github.com/nsidc/earthaccess/pull/876))
+  ([@mfisher87](https://github.com/mfisher87))
 
 ### Fixed
 

README.md

@@ -82,7 +82,7 @@ Visit [our quick start guide](https://earthaccess.readthedocs.io/en/latest/quick
 
 ## Compatibility
 
-The _minimum_ supported Python version is **3.9**.
+The _minimum_ supported Python version is **3.10**.
 
 
 ## How to Contribute to `earthaccess`

noxfile.py

@@ -32,7 +32,7 @@ def tests(session: nox.Session) -> None:
     )
 
 
-@nox.session(name="test-min-deps", python="3.9", venv_backend="uv")
+@nox.session(name="test-min-deps", python="3.10", venv_backend="uv")
 def test_min_deps(session: nox.Session) -> None:
     """Run the unit tests using the lowest compatible version of all direct dependencies."""
     session.install("--resolution", "lowest-direct", "--editable", ".[test]")

pyproject.toml

@@ -26,16 +26,16 @@ classifiers = [
     "Operating System :: Microsoft :: Windows",
     "Operating System :: MacOS",
     "Operating System :: POSIX :: Linux",
-    "Programming Language :: Python :: 3.9",
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
     "Programming Language :: Python :: 3.12",
+    "Programming Language :: Python :: 3.13",
     "Topic :: Software Development :: Libraries",
     "Topic :: Software Development",
     "License :: OSI Approved :: MIT License",
 ]
 
-requires-python = ">=3.9"
+requires-python = ">=3.10"
 
 dependencies = [
   "python-cmr >=0.10.0",
@@ -57,14 +57,12 @@ Changelog = "https://github.com/nsidc/earthaccess/blob/main/CHANGELOG.md"
 
 [project.optional-dependencies]
 kerchunk = [
+  "numpy >=1.26.4",
   "kerchunk",
   "dask",
-  "h5py >=3.0",
+  "h5py >=3.6.0",
   "h5netcdf",
   "xarray",
-  # kerchunk requires numpy, but numpy >=1.26.0 is required for Python 3.12
-  "numpy >=1.24.0; python_version < '3.12'",
-  "numpy >=1.26.0; python_version >= '3.12'",
 ]
 dev = [
   "bump-my-version >=0.10.0",
@@ -125,7 +123,7 @@ docs = [
 filterwarnings = ["error::UserWarning"]
 
 [tool.mypy]
-python_version = "3.9"
+python_version = "3.10"
 files = ["earthaccess", "tests"]
 mypy_path = ["earthaccess", "tests", "stubs"]
 disallow_untyped_defs = true