Drop Python 3.9

.github/workflows/publish.yml

@@ -23,7 +23,7 @@ jobs:
       uses: actions/setup-python@v5
       with:
         # Python version should be the minimum supported version
-        python-version: "3.9"
+        python-version: "3.10"
 
     - name: Install build tools
       run: |

.github/workflows/pytest-remote-data.yml

@@ -56,10 +56,10 @@ jobs:
     strategy:
       fail-fast: false  # don't cancel other matrix jobs when one fails
       matrix:
-        python-version: [3.9, "3.10", "3.11", "3.12", "3.13"]
+        python-version: ["3.10", "3.11", "3.12", "3.13"]
         suffix: ['']  # the alternative to "-min"
         include:
-          - python-version: 3.9
+          - python-version: "3.10"
             suffix: -min
 
     runs-on: ubuntu-latest
@@ -103,7 +103,7 @@ jobs:
         run: pytest tests/iotools --cov=./ --cov-report=xml --remote-data
 
       - name: Upload coverage to Codecov
-        if: matrix.python-version == 3.9 && matrix.suffix == ''
+        if: matrix.python-version == "3.10" && matrix.suffix == ''
         uses: codecov/codecov-action@v4
         with:
           fail_ci_if_error: true

.github/workflows/pytest.yml

@@ -12,12 +12,12 @@ jobs:
       fail-fast: false  # don't cancel other matrix jobs when one fails
       matrix:
         os: [ubuntu-latest, macos-latest, windows-latest]
-        python-version: [3.9, "3.10", "3.11", "3.12", "3.13"]
+        python-version: ["3.10", "3.11", "3.12", "3.13"]
         environment-type: [conda, bare]
         suffix: ['']  # placeholder as an alternative to "-min"
         include:
           - os: ubuntu-latest
-            python-version: 3.9
+            python-version: "3.10"
             environment-type: conda
             suffix: -min
         exclude:
@@ -83,7 +83,7 @@ jobs:
           pytest tests --cov=./ --cov-report=xml --ignore=tests/iotools
 
       - name: Upload coverage to Codecov
-        if: matrix.python-version == 3.9 && matrix.suffix == '' && matrix.os == 'ubuntu-latest' && matrix.environment-type == 'conda'
+        if: matrix.python-version == "3.10" && matrix.suffix == '' && matrix.os == 'ubuntu-latest' && matrix.environment-type == 'conda'
         uses: codecov/codecov-action@v4
         with:
           fail_ci_if_error: true

benchmarks/asv.conf.json

@@ -113,19 +113,19 @@
     "include": [
         // minimum supported versions
         {
-            "python": "3.9",
+            "python": "3.10",
             "build": "",
-            "numpy": "1.19.5",
-            "pandas": "1.3.0",
-            "scipy": "1.6.0",
+            "numpy": "1.21.5",
+            "pandas": "1.4.1",  // first anaconda version to support py 3.10
+            "scipy": "1.7.2",
             // Note: these don't have a minimum in setup.py
-            "h5py": "3.1.0",
-            "ephem": "4.0.0.1",  // first version to support py 3.9
-            "numba": "0.53.0",  // first version to support py 3.9
+            "h5py": "3.6.0",  // first version to support py 3.10
+            "ephem": "4.1.1",  // first version to support py 3.10
+            "numba": "0.55.0",  // first version to support py 3.10
         },
         // latest versions available
         {
-            "python": "3.9",
+            "python": "3.10",
             "build": "",
             "numpy": "",
             "pandas": "",

ci/requirements-py3.9-min.yml → ci/requirements-py3.10-min.yml

@@ -8,14 +8,14 @@ dependencies:
     - pytest-cov
     - pytest-mock
     - pytest-timeout
-    - python=3.9
+    - python=3.10
     - pytz
     - requests
     - pip:
-        - h5py==3.0.0
-        - numpy==1.19.3
-        - pandas==1.3.0  # min version of pvlib
-        - scipy==1.6.0
+        - h5py==3.6.0
+        - numpy==1.21.2
+        - pandas==1.3.3  # min version of pvlib
+        - scipy==1.7.2
         - pytest-rerunfailures # conda version is >3.6
         - pytest-remotedata # conda package is 0.3.0, needs > 0.3.1
         - requests-mock

ci/requirements-py3.10.yml

@@ -8,8 +8,8 @@ dependencies:
     - ephem
     - h5py
     - numba
-    - numpy >= 1.17.3
-    - pandas >= 1.3.0
+    - numpy >= 1.21.2
+    - pandas >= 1.3.3
     - pip
     - pytest
     - pytest-cov
@@ -21,7 +21,7 @@ dependencies:
     - python=3.10
     - pytz
     - requests
-    - scipy >= 1.6.0
+    - scipy >= 1.7.2
     - statsmodels
     - pip:
         - nrel-pysam>=2.0

ci/requirements-py3.11.yml

@@ -8,8 +8,8 @@ dependencies:
     - ephem
     - h5py
     - numba
-    - numpy >= 1.17.3
-    - pandas >= 1.3.0
+    - numpy >= 1.21.2
+    - pandas >= 1.3.3
     - pip
     - pytest
     - pytest-cov
@@ -21,7 +21,7 @@ dependencies:
     - python=3.11
     - pytz
     - requests
-    - scipy >= 1.6.0
+    - scipy >= 1.7.2
     - statsmodels
     - pip:
         - nrel-pysam>=2.0

ci/requirements-py3.12.yml

@@ -8,8 +8,8 @@ dependencies:
     - ephem
     - h5py
     - numba
-    - numpy >= 1.17.3
-    - pandas >= 1.3.0
+    - numpy >= 1.21.2
+    - pandas >= 1.3.3
     - pip
     - pytest
     - pytest-cov
@@ -21,7 +21,7 @@ dependencies:
     - python=3.12
     - pytz
     - requests
-    - scipy >= 1.6.0
+    - scipy >= 1.7.2
     - statsmodels
     - pip:
         - nrel-pysam>=2.0

ci/requirements-py3.13.yml

@@ -8,8 +8,8 @@ dependencies:
     - ephem
     - h5py
     - numba
-    - numpy >= 1.17.3
-    - pandas >= 1.3.0
+    - numpy >= 1.21.2
+    - pandas >= 1.3.3
     - pip
     - pytest
     - pytest-cov
@@ -21,7 +21,7 @@ dependencies:
     - python=3.13
     - pytz
     - requests
-    - scipy >= 1.6.0
+    - scipy >= 1.7.2
     - statsmodels
     - pip:
         - nrel-pysam>=2.0

docs/sphinx/source/whatsnew/v0.13.1.rst

@@ -52,6 +52,10 @@ Benchmarking
 
 Requirements
 ~~~~~~~~~~~~
+* Drop support for Python 3.9 (reaches End of Life in Oct 2025). (:pull:`2547`)
+* Advance minimum numpy to 1.21.2. (:pull:`2547`)
+* Advance minimum scipy to 1.7.2. (:pull:`2547`)
+* Advance minimum pandas to 1.3.3. (:pull:`2547`)
 
 
 Maintenance

pyproject.toml

@@ -9,13 +9,13 @@ description = "A set of functions and classes for simulating the performance of
 authors = [
     { name = "pvlib python Developers", email = "[email protected]" },
 ]
-requires-python = ">=3.9"
+requires-python = ">=3.10"
 dependencies = [
-    'numpy >= 1.19.3',
-    'pandas >= 1.3.0',
+    'numpy >= 1.21.2',
+    'pandas >= 1.3.3',
     'pytz',
     'requests',
-    'scipy >= 1.6.0',
+    'scipy >= 1.7.2',
     'h5py',
 ]
 license = "BSD-3-Clause"
@@ -108,8 +108,4 @@ testpaths = "tests"
 # https://docs.python.org/3/library/warnings.html#the-warnings-filter
 filterwarnings = [
     "ignore:Using or importing the ABCs:DeprecationWarning:.*patsy:",
-    # deprecation warnings from numpy 1.20
-    "ignore:`np.long` is a deprecated alias:DeprecationWarning:.*numba:",
-    "ignore:`np.int` is a deprecated alias:DeprecationWarning:.*(numba|scipy):",
-    "ignore:`np.bool` is a deprecated alias:DeprecationWarning:.*numba:",
 ]