Support for Python 3.14.0 (#2850)

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

Author: valeriupredoi

.github/workflows/build-and-deploy-on-pypi.yml

@@ -22,10 +22,10 @@ jobs:
       - uses: actions/checkout@v6
         with:
           fetch-depth: 0
-      - name: Set up Python 3.13
+      - name: Set up Python 3.14
         uses: actions/setup-python@v6
         with:
-          python-version: "3.13"
+          python-version: "3.14"
       - name: Install pep517
         run: >-
           python -m

.github/workflows/create-condalock-file.yml

@@ -28,7 +28,7 @@ jobs:
         with:
           auto-update-conda: true
           activate-environment: esmvaltool-fromlock
-          python-version: "3.13"
+          python-version: "3.14"
           miniforge-version: "latest"
           use-mamba: true
       - name: Update and show conda config

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

@@ -40,7 +40,7 @@ jobs:
     if: github.repository == 'ESMValGroup/ESMValCore'  # avoid GAs in forks
     strategy:
       matrix:
-        python-version: ["3.12", "3.13"]
+        python-version: ["3.12", "3.13", "3.14"]
       # fail-fast set to False allows all other tests
       # in the workflow to run regardless of any fail
       fail-fast: false
@@ -76,7 +76,7 @@ jobs:
     if: github.repository == 'ESMValGroup/ESMValCore'  # avoid GAs in forks
     strategy:
       matrix:
-        python-version: ["3.12", "3.13"]
+        python-version: ["3.12", "3.13", "3.14"]
         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

@@ -30,7 +30,7 @@ jobs:
     if: github.repository == 'ESMValGroup/ESMValCore'  # avoid GAs in forks
     strategy:
       matrix:
-        python-version: ["3.12", "3.13"]
+        python-version: ["3.12", "3.13", "3.14"]
       fail-fast: false
     name: Linux Python ${{ matrix.python-version }}
     steps:

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

@@ -40,7 +40,7 @@ jobs:
     if: github.repository == 'ESMValGroup/ESMValCore'  # avoid GAs in forks
     strategy:
       matrix:
-        python-version: ["3.12", "3.13"]
+        python-version: ["3.12", "3.13", "3.14"]
       # fail-fast set to False allows all other tests
       # in the workflow to run regardless of any fail
       fail-fast: false
@@ -79,7 +79,7 @@ jobs:
     if: github.repository == 'ESMValGroup/ESMValCore'  # avoid GAs in forks
     strategy:
       matrix:
-        python-version: ["3.12", "3.13"]
+        python-version: ["3.12", "3.13", "3.14"]
         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

@@ -38,7 +38,7 @@ jobs:
     if: github.repository == 'ESMValGroup/ESMValCore'  # avoid GAs in forks
     strategy:
       matrix:
-        python-version: ["3.12", "3.13"]
+        python-version: ["3.12", "3.13", "3.14"]
       fail-fast: false
     name: Linux Python ${{ matrix.python-version }}
     steps:
@@ -76,7 +76,7 @@ jobs:
     if: github.repository == 'ESMValGroup/ESMValCore'  # avoid GAs in forks
     strategy:
       matrix:
-        python-version: ["3.12", "3.13"]
+        python-version: ["3.12", "3.13", "3.14"]
         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

@@ -23,7 +23,7 @@ jobs:
     if: github.repository == 'ESMValGroup/ESMValCore'  # avoid GAs in forks
     strategy:
       matrix:
-        python-version: ["3.12", "3.13"]
+        python-version: ["3.12", "3.13", "3.14"]
       fail-fast: false
     name: Linux Python ${{ matrix.python-version }}
     steps:
@@ -56,7 +56,7 @@ jobs:
     if: github.repository == 'ESMValGroup/ESMValCore'  # avoid GAs in forks
     strategy:
       matrix:
-        python-version: ["3.12", "3.13"]
+        python-version: ["3.12", "3.13", "3.14"]
         architecture: ["x64"]  # need to force Intel, arm64 builds have issues
       fail-fast: false
     name: OSX Python ${{ matrix.python-version }}

.github/workflows/run-tests.yml

@@ -40,7 +40,7 @@ jobs:
     if: github.repository == 'ESMValGroup/ESMValCore'  # avoid GAs in forks
     strategy:
       matrix:
-        python-version: ["3.12", "3.13"]
+        python-version: ["3.12", "3.13", "3.14"]
       fail-fast: false
     name: Linux Python ${{ matrix.python-version }}
     steps:
@@ -77,7 +77,7 @@ jobs:
     if: github.repository == 'ESMValGroup/ESMValCore'  # avoid GAs in forks
     strategy:
       matrix:
-        python-version: ["3.12", "3.13"]
+        python-version: ["3.12", "3.13", "3.14"]
         architecture: ["x64"]  # need to force Intel, arm64 builds have issues
       fail-fast: false
     name: OSX Python ${{ matrix.python-version }}

environment.yml

@@ -21,7 +21,7 @@ dependencies:
   - humanfriendly
   - intake-esgf >=2025.10.22
   - intake-esm
-  - iris >=3.12.2,<3.14.1 # https://github.com/SciTools/iris/issues/6417, https://github.com/ESMValGroup/ESMValCore/issues/2921
+  - iris
   - iris-esmf-regrid >=0.11.0
   - iris-grib >=0.20.0  # github.com/ESMValGroup/ESMValCore/issues/2535
   - isodate >=0.7.0  # incompatible with very old 0.6.1

pyproject.toml

@@ -63,7 +63,7 @@ dependencies = [
     "requests",
     "rich",
     "scipy>=1.6",
-    "scitools-iris>=3.12.2,<3.14.1",  # github.com/SciTools/iris/issues/6417, https://github.com/ESMValGroup/ESMValCore/issues/2921
+    "scitools-iris",
     "shapely>=2.0.0",
     "stratify>=0.3",
     "xarray",