NEP29: Set minimum required version to Python 3.8+ (#1676)

Co-authored-by: Wei Ji <23487320+weiji14@users.noreply.github.com>

Author: michaelgrund

.github/workflows/ci_tests.yaml

@@ -30,7 +30,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: [3.7, 3.9]
+        python-version: ['3.8', '3.9']
         os: [ubuntu-latest, macOS-latest, windows-latest]
         # Is it a draft Pull Request (true or false)?
         isDraft:
@@ -44,13 +44,13 @@ jobs:
           # - os: ubuntu-latest
           #   python-version: 3.7
           #   isDraft: true
-        # Pair Python 3.7 with NumPy 1.19 and Python 3.9 with NumPy 1.21
+        # Pair Python 3.8 with NumPy 1.19 and Python 3.9 with NumPy 1.21
         # Only install optional packages on Python 3.9/NumPy 1.21
         include:
-          - python-version: 3.7
+          - python-version: '3.8'
             numpy-version: '1.19'
             optional-packages: ''
-          - python-version: 3.9
+          - python-version: '3.9'
             numpy-version: '1.21'
             optional-packages: 'geopandas ipython'
     timeout-minutes: 30

doc/install.rst

@@ -35,7 +35,7 @@ Start by looking at the tutorials on our sidebar, good luck!
 Which Python?
 -------------
 
-PyGMT is tested to run on **Python 3.7 or greater**.
+PyGMT is tested to run on **Python 3.8 or greater**.
 
 We recommend using the `Anaconda <https://www.anaconda.com/distribution>`__
 Python distribution to ensure you have all dependencies installed and the

setup.py

@@ -27,14 +27,13 @@
     "Intended Audience :: Education",
     "Topic :: Scientific/Engineering",
     "Topic :: Software Development :: Libraries",
-    "Programming Language :: Python :: 3.7",
     "Programming Language :: Python :: 3.8",
     "Programming Language :: Python :: 3.9",
     "Programming Language :: Python :: 3.10",
     f"License :: OSI Approved :: {LICENSE}",
 ]
 PLATFORMS = "Any"
-PYTHON_REQUIRES = ">=3.7"
+PYTHON_REQUIRES = ">=3.8"
 INSTALL_REQUIRES = ["numpy>=1.19", "pandas", "xarray", "netCDF4", "packaging"]
 # Configuration for setuptools-scm
 SETUP_REQUIRES = ["setuptools_scm"]