SPEC 0: Bump minimum supported version to Python 3.12 (#4248)

Author: seisman

.github/workflows/ci_tests.yaml

@@ -56,7 +56,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ['3.11', '3.14']
+        python-version: ['3.12', '3.14']
         os: [ubuntu-latest, ubuntu-24.04-arm, macos-latest, windows-latest]
         # Is it a draft Pull Request (true or false)?
         isDraft:
@@ -70,8 +70,8 @@ jobs:
           - os: windows-latest
             isDraft: true
         include:
-          # Python 3.11 + core packages (minimum supported versions) + optional packages (minimum supported versions if any)
-          - python-version: '3.11'
+          # Python 3.12 + core packages (minimum supported versions) + optional packages (minimum supported versions if any)
+          - python-version: '3.12'
             numpy-version: '2.0'
             pandas-version: '=2.2'
             xarray-version: '=2024.5'
@@ -82,9 +82,9 @@ jobs:
             pandas-version: ''
             xarray-version: ''
             optional-packages: ' contextily geopandas ipython pyarrow-core rioxarray netCDF4 sphinx-gallery'
-          # Python 3.12 + core packages (Linux only)
+          # Python 3.13 + core packages (Linux only)
           - os: 'ubuntu-latest'
-            python-version: '3.12'
+            python-version: '3.13'
             numpy-version: ''
             pandas-version: ''
             xarray-version: ''

.github/workflows/ci_tests_legacy.yaml

@@ -58,7 +58,7 @@ jobs:
         with:
           environment-name: pygmt
           create-args: >-
-            python=3.11
+            python=3.12
             gmt=${{ matrix.gmt_version }}
             ghostscript
             numpy=2.0

environment.yml

@@ -3,7 +3,7 @@ channels:
     - conda-forge
     - nodefaults
 dependencies:
-    - python>=3.11
+    - python>=3.12
     # Required dependencies
     - gmt=6.6.0
     - ghostscript=10.06.0

pyproject.toml

@@ -6,7 +6,7 @@ build-backend = "setuptools.build_meta"
 name = "pygmt"
 description = "A Python interface for the Generic Mapping Tools"
 readme = "README.md"
-requires-python = ">=3.11"
+requires-python = ">=3.12"
 authors = [{name = "The PyGMT Developers", email = "pygmt.team@gmail.com"}]
 license = "BSD-3-Clause"
 license-files = ["LICENSE.txt"]
@@ -30,7 +30,6 @@ classifiers = [
     "Operating System :: Microsoft :: Windows",
     "Operating System :: POSIX",
     "Operating System :: Unix",
-    "Programming Language :: Python :: 3.11",
     "Programming Language :: Python :: 3.12",
     "Programming Language :: Python :: 3.13",
     "Programming Language :: Python :: 3.14",