[Merge after v2.11.0 Release] Remove support for Python 3.9 (#2447)

Co-authored-by: Bouwe Andela <[email protected]>

.github/workflows/install-from-conda.yml

@@ -39,7 +39,7 @@ jobs:
     runs-on: "ubuntu-latest"
     strategy:
       matrix:
-        python-version: ["3.9", "3.10", "3.11", "3.12"]
+        python-version: ["3.10", "3.11", "3.12"]
       # fail-fast set to False allows all other tests
       # in the workflow to run regardless of any fail
       fail-fast: false
@@ -75,7 +75,7 @@ jobs:
     runs-on: "macos-latest"
     strategy:
       matrix:
-        python-version: ["3.9", "3.10", "3.11", "3.12"]
+        python-version: ["3.10", "3.11", "3.12"]
         architecture: ["x64"]  # need to force Intel, arm64 builds have issues
       fail-fast: false
     name: OSX Python ${{ matrix.python-version }}

.github/workflows/install-from-condalock-file.yml

@@ -29,7 +29,7 @@ jobs:
     runs-on: "ubuntu-latest"
     strategy:
       matrix:
-        python-version: ["3.9", "3.10", "3.11", "3.12"]
+        python-version: ["3.10", "3.11", "3.12"]
       fail-fast: false
     name: Linux Python ${{ matrix.python-version }}
     steps:

.github/workflows/install-from-pypi.yml

@@ -39,7 +39,7 @@ jobs:
     runs-on: "ubuntu-latest"
     strategy:
       matrix:
-        python-version: ["3.9", "3.10", "3.11", "3.12"]
+        python-version: ["3.10", "3.11", "3.12"]
       # fail-fast set to False allows all other tests
       # in the workflow to run regardless of any fail
       fail-fast: false
@@ -77,7 +77,7 @@ jobs:
     runs-on: "macos-latest"
     strategy:
       matrix:
-        python-version: ["3.9", "3.10", "3.11", "3.12"]
+        python-version: ["3.10", "3.11", "3.12"]
         architecture: ["x64"]  # need to force Intel, arm64 builds have issues
       fail-fast: false
     name: OSX Python ${{ matrix.python-version }}

.github/workflows/install-from-source.yml

@@ -37,7 +37,7 @@ jobs:
     runs-on: "ubuntu-latest"
     strategy:
       matrix:
-        python-version: ["3.9", "3.10", "3.11", "3.12"]
+        python-version: ["3.10", "3.11", "3.12"]
       fail-fast: false
     name: Linux Python ${{ matrix.python-version }}
     steps:
@@ -74,7 +74,7 @@ jobs:
     runs-on: "macos-latest"
     strategy:
       matrix:
-        python-version: ["3.9", "3.10", "3.11", "3.12"]
+        python-version: ["3.10", "3.11", "3.12"]
         architecture: ["x64"]  # need to force Intel, arm64 builds have issues
       fail-fast: false
     name: OSX Python ${{ matrix.python-version }}

.github/workflows/run-tests-monitor.yml

@@ -22,7 +22,7 @@ jobs:
     runs-on: "ubuntu-latest"
     strategy:
       matrix:
-        python-version: ["3.9", "3.10", "3.11", "3.12"]
+        python-version: ["3.10", "3.11", "3.12"]
       fail-fast: false
     name: Linux Python ${{ matrix.python-version }}
     steps:
@@ -55,7 +55,7 @@ jobs:
     runs-on: "macos-latest"
     strategy:
       matrix:
-        python-version: ["3.9", "3.10", "3.11", "3.12"]
+        python-version: ["3.10", "3.11", "3.12"]
         architecture: ["x64"]  # need to force Intel, arm64 builds have issues
       fail-fast: false
     name: OSX Python ${{ matrix.python-version }}

.github/workflows/run-tests.yml

@@ -39,7 +39,7 @@ jobs:
     runs-on: "ubuntu-latest"
     strategy:
       matrix:
-        python-version: ["3.9", "3.10", "3.11", "3.12"]
+        python-version: ["3.10", "3.11", "3.12"]
       fail-fast: false
     name: Linux Python ${{ matrix.python-version }}
     steps:
@@ -73,7 +73,7 @@ jobs:
     runs-on: "macos-latest"
     strategy:
       matrix:
-        python-version: ["3.9", "3.10", "3.11", "3.12"]
+        python-version: ["3.10", "3.11", "3.12"]
         architecture: ["x64"]  # need to force Intel, arm64 builds have issues
       fail-fast: false
     name: OSX Python ${{ matrix.python-version }}

doc/quickstart/install.rst

@@ -22,7 +22,7 @@ and install ESMValCore into it with a single command:
 
 .. code-block:: bash
 
-    conda create --name esmvalcore -c conda-forge esmvalcore 'python=3.10'
+    conda create --name esmvalcore -c conda-forge esmvalcore
 
 Don't forget to activate the newly created environment after the installation:
 

environment.yml

@@ -19,7 +19,6 @@ dependencies:
   - fire
   - geopy
   - humanfriendly
-  - importlib_metadata  # required for Python < 3.10
   - iris >=3.10.0
   - iris-esmf-regrid >=0.11.0
   - isodate >=0.7.0  # incompatible with very old 0.6.1
@@ -37,7 +36,7 @@ dependencies:
   - psutil
   - py-cordex
   - pybtex
-  - python >=3.9
+  - python >=3.10
   - python-stratify >=0.3
   - pyyaml
   - requests

setup.cfg

@@ -36,7 +36,7 @@ include_trailing_comma = true
 
 [mypy]
 # see mypy.readthedocs.io/en/stable/command_line.html
-python_version = 3.10
+python_version = 3.12
 ignore_missing_imports = True
 files = esmvalcore, tests
 

setup.py

@@ -39,7 +39,6 @@
         'fire',
         'geopy',
         'humanfriendly',
-        "importlib_metadata;python_version<'3.10'",
         'isodate>=0.7.0',  # incompatible with very old 0.6.1
         'jinja2',
         'nc-time-axis',  # needed by iris.plot
@@ -217,9 +216,9 @@ def read_description(filename):
         'Natural Language :: English',
         'Operating System :: POSIX :: Linux',
         'Programming Language :: Python :: 3',
-        'Programming Language :: Python :: 3.9',
         'Programming Language :: Python :: 3.10',
         'Programming Language :: Python :: 3.11',
+        'Programming Language :: Python :: 3.12',
         'Topic :: Scientific/Engineering',
         'Topic :: Scientific/Engineering :: Atmospheric Science',
         'Topic :: Scientific/Engineering :: GIS',

tests/unit/preprocessor/_regrid_esmpy/test_regrid_esmpy.py

@@ -1,5 +1,4 @@
 """Unit tests for the esmvalcore.preprocessor._regrid_esmpy module."""
-import sys
 from unittest import mock
 
 import cf_units
@@ -381,9 +380,6 @@ def test_coords_iris_to_esmpy_2d_non_circular(self):
         self.assert_array_equal(esmpy_lon_corners,
                                 self.expected_esmpy_lon_corners)
 
-    @pytest.mark.skipif(sys.version_info.major == 3
-                        and sys.version_info.minor == 9,
-                        reason="bug in mock.py for Python 3.9.0 and 3.9.1")
     def test_get_grid_circular(self):
         """Test building of ESMF grid from iris cube circular longitude."""
         expected_get_coords_calls = [
@@ -405,9 +401,6 @@ def test_get_grid_circular(self):
             mg.add_item.assert_called_once_with(mock.sentinel.gi_mask,
                                                 mock.sentinel.sl_center)
 
-    @pytest.mark.skipif(sys.version_info.major == 3
-                        and sys.version_info.minor == 9,
-                        reason="bug in mock.py for Python 3.9.0 and 3.9.1")
     def test_get_grid_non_circular(self):
         """Test building of ESMF grid from iris cube non circular longitude."""
         expected_get_coords_calls = [
@@ -465,9 +458,6 @@ def test_is_lon_circular_2d_aux_coords_non_circ(self):
 
     @mock.patch('esmvalcore.preprocessor._regrid_esmpy.esmpy.Grid', MockGrid)
     @mock.patch('esmvalcore.preprocessor._regrid_esmpy.esmpy.Field')
-    @pytest.mark.skipif(sys.version_info.major == 3
-                        and sys.version_info.minor == 9,
-                        reason="bug in mock.py for Python 3.9.0 and 3.9.1")
     def test_cube_to_empty_field(self, mock_field):
         """Test building of empty field from iris cube."""
         field = cube_to_empty_field(self.cube)